tests & fixes
[m6w6/ext-pq] / src / php_pq.c
index 6223ef95c74f90a47194102be28773dbe6be1006..a0d18a510023f7aa5944ad106f447ded84392ea6 100644 (file)
 
 #include <php.h>
 #include <Zend/zend_interfaces.h>
+#include <Zend/zend_exceptions.h>
 #include <ext/standard/info.h>
 #include <ext/standard/php_smart_str.h>
 #include <ext/spl/spl_array.h>
+#include <ext/spl/spl_exceptions.h>
 #include <ext/raphf/php_raphf.h>
 
 #include <libpq-events.h>
@@ -47,8 +49,12 @@ static int php_pqconn_event(PGEventId id, void *e, void *data);
 
 #define PHP_PQclear(_r) \
        do { \
-               zval *_resinszv = PQresultInstanceData((_r), php_pqconn_event); \
-               if (!_resinszv) PQclear((_r)); \
+               php_pqres_object_t *_o = PQresultInstanceData((_r), php_pqconn_event); \
+               if (_o) { \
+                       php_pq_object_delref(_o TSRMLS_CC); \
+               } else { \
+                       PQclear(_r); \
+               } \
        } while (0)
 
 /*
@@ -86,6 +92,60 @@ static zend_class_entry *php_pqevent_class_entry;
 static zend_class_entry *php_pqlob_class_entry;
 static zend_class_entry *php_pqcopy_class_entry;
 
+typedef enum php_pqexc_type {
+       EX_INVALID_ARGUMENT,
+       EX_RUNTIME,
+       EX_CONNECTION_FAILED,
+       EX_IO,
+       EX_ESCAPE,
+       EX_BAD_METHODCALL,
+       EX_UNINITIALIZED,
+       EX_DOMAIN,
+       EX_SQL
+} php_pqexc_type_t;
+
+static zend_class_entry *php_pqexc_interface_class_entry;
+static zend_class_entry *php_pqexc_invalid_argument_class_entry;
+static zend_class_entry *php_pqexc_runtime_class_entry;
+static zend_class_entry *php_pqexc_bad_methodcall_class_entry;
+static zend_class_entry *php_pqexc_domain_class_entry;
+
+static zend_class_entry *exce(php_pqexc_type_t type)
+{
+       switch (type) {
+       default:
+       case EX_INVALID_ARGUMENT:
+               return php_pqexc_invalid_argument_class_entry;
+       case EX_RUNTIME:
+       case EX_CONNECTION_FAILED:
+       case EX_IO:
+       case EX_ESCAPE:
+               return php_pqexc_runtime_class_entry;
+       case EX_UNINITIALIZED:
+       case EX_BAD_METHODCALL:
+               return php_pqexc_bad_methodcall_class_entry;
+       case EX_DOMAIN:
+       case EX_SQL:
+               return php_pqexc_domain_class_entry;
+       }
+}
+
+static zval *throw_exce(php_pqexc_type_t type TSRMLS_DC, const char *fmt, ...)
+{
+       char *msg;
+       zval *zexc;
+       va_list argv;
+
+       va_start(argv, fmt);
+       vspprintf(&msg, 0, fmt, argv);
+       va_end(argv);
+
+       zexc = zend_throw_exception(exce(type), msg, type TSRMLS_CC);
+       efree(msg);
+
+       return zexc;
+}
+
 static zend_object_handlers php_pqconn_object_handlers;
 static zend_object_handlers php_pqtypes_object_handlers;
 static zend_object_handlers php_pqres_object_handlers;
@@ -197,6 +257,7 @@ typedef struct php_pqtxn {
        php_pqconn_object_t *conn;
        php_pqtxn_isolation_t isolation;
        unsigned savepoint;
+       unsigned open:1;
        unsigned readonly:1;
        unsigned deferrable:1;
 } php_pqtxn_t;
@@ -222,8 +283,8 @@ typedef struct php_pqcancel_object {
 
 typedef struct php_pqevent {
        php_pq_callback_t cb;
-       php_pqconn_object_t *conn;
        char *type;
+       ulong h;
 } php_pqevent_t;
 
 typedef struct php_pqevent_object {
@@ -335,10 +396,14 @@ static STATUS php_pqres_iterator_valid(zend_object_iterator *i TSRMLS_DC)
        php_pqres_iterator_t *iter = (php_pqres_iterator_t *) i;
        php_pqres_object_t *obj = zend_object_store_get_object(iter->zi.data TSRMLS_CC);
 
-       if (PQresultStatus(obj->intern->res) != PGRES_TUPLES_OK) {
-               return FAILURE;
-       }
-       if (PQntuples(obj->intern->res) <= iter->index) {
+       switch (PQresultStatus(obj->intern->res)) {
+       case PGRES_TUPLES_OK:
+       case PGRES_SINGLE_TUPLE:
+               if (PQntuples(obj->intern->res) <= iter->index) {
+                       return FAILURE;
+               }
+               break;
+       default:
                return FAILURE;
        }
 
@@ -458,27 +523,64 @@ static int php_pqres_count_elements(zval *object, long *count TSRMLS_DC)
 {
        php_pqres_object_t *obj = zend_object_store_get_object(object TSRMLS_CC);
 
-       if (obj->intern) {
+       if (!obj->intern) {
+               return FAILURE;
+       } else {
                *count = (long) PQntuples(obj->intern->res);
                return SUCCESS;
-       } else {
-               return FAILURE;
        }
 }
 
 static STATUS php_pqres_success(PGresult *res TSRMLS_DC)
 {
+       zval *zexc;
+
        switch (PQresultStatus(res)) {
        case PGRES_BAD_RESPONSE:
        case PGRES_NONFATAL_ERROR:
        case PGRES_FATAL_ERROR:
-               php_error_docref(NULL TSRMLS_CC, E_WARNING, "%s", PHP_PQresultErrorMessage(res));
+               zexc = throw_exce(EX_SQL TSRMLS_CC, "%s", PHP_PQresultErrorMessage(res));
+               zend_update_property_string(php_pqexc_domain_class_entry, zexc, ZEND_STRL("sqlstate"), PQresultErrorField(res, PG_DIAG_SQLSTATE) TSRMLS_CC);
                return FAILURE;
        default:
                return SUCCESS;
        }
 }
 
+/*
+static void php_pqconn_del_eventhandler(php_pqconn_object_t *obj, const char *type_str, size_t type_len, ulong id TSRMLS_DC)
+{
+       zval **evhs;
+
+       if (SUCCESS == zend_hash_find(&obj->intern->eventhandlers, type_str, type_len + 1, (void *) &evhs)) {
+               zend_hash_index_del(Z_ARRVAL_PP(evhs), id);
+       }
+}
+*/
+
+static ulong php_pqconn_add_eventhandler(php_pqconn_object_t *obj, const char *type_str, size_t type_len, zval *zevent TSRMLS_DC)
+{
+       zval **evhs;
+       ulong h;
+
+       if (SUCCESS == zend_hash_find(&obj->intern->eventhandlers, type_str, type_len + 1, (void *) &evhs)) {
+               Z_ADDREF_P(zevent);
+               h = zend_hash_next_free_element(Z_ARRVAL_PP(evhs));
+               add_next_index_zval(*evhs, zevent);
+       } else {
+               zval *evh;
+
+               MAKE_STD_ZVAL(evh);
+               array_init(evh);
+               Z_ADDREF_P(zevent);
+               h = zend_hash_next_free_element(Z_ARRVAL_P(evh));
+               add_next_index_zval(evh, zevent);
+               zend_hash_add(&obj->intern->eventhandlers, type_str, type_len + 1, (void *) &evh, sizeof(zval *), NULL);
+       }
+
+       return h;
+}
+
 static void php_pq_callback_dtor(php_pq_callback_t *cb) {
        if (cb->fci.size > 0) {
                zend_fcall_info_args_clear(&cb->fci, 1);
@@ -512,6 +614,20 @@ static void php_pq_object_to_zval(void *o, zval **zv TSRMLS_DC)
        (*zv)->value.obj = obj->zv;
 }
 
+static void php_pq_object_to_zval_no_addref(void *o, zval **zv TSRMLS_DC)
+{
+       php_pq_object_t *obj = o;
+
+       if (!*zv) {
+               MAKE_STD_ZVAL(*zv);
+       }
+
+       /* no add ref */
+
+       (*zv)->type = IS_OBJECT;
+       (*zv)->value.obj = obj->zv;
+}
+
 static void php_pq_object_addref(void *o TSRMLS_DC)
 {
        php_pq_object_t *obj = o;
@@ -527,7 +643,9 @@ static void php_pq_object_delref(void *o TSRMLS_DC)
 static void php_pqconn_object_free(void *o TSRMLS_DC)
 {
        php_pqconn_object_t *obj = o;
-
+#if DBG_GC
+       fprintf(stderr, "FREE conn(#%d) %p\n", obj->zv.handle, obj);
+#endif
        if (obj->intern) {
                php_resource_factory_handle_dtor(&obj->intern->factory, obj->intern->conn TSRMLS_CC);
                php_resource_factory_dtor(&obj->intern->factory);
@@ -544,7 +662,9 @@ static void php_pqconn_object_free(void *o TSRMLS_DC)
 static void php_pqtypes_object_free(void *o TSRMLS_DC)
 {
        php_pqtypes_object_t *obj = o;
-
+#if DBG_GC
+       fprintf(stderr, "FREE types(#%d) %p (conn(#%d): %p)\n", obj->zv.handle, obj, obj->intern->conn->zv.handle, obj->intern->conn);
+#endif
        if (obj->intern) {
                zend_hash_destroy(&obj->intern->types);
                php_pq_object_delref(obj->intern->conn TSRMLS_CC);
@@ -558,19 +678,14 @@ static void php_pqtypes_object_free(void *o TSRMLS_DC)
 static void php_pqres_object_free(void *o TSRMLS_DC)
 {
        php_pqres_object_t *obj = o;
-
+#if DBG_GC
+       fprintf(stderr, "FREE res(#%d) %p\n", obj->zv.handle, obj);
+#endif
        if (obj->intern) {
                if (obj->intern->res) {
-                       zval *res = PQresultInstanceData(obj->intern->res, php_pqconn_event);
-                       if (res) {
-                               if (1 == Z_REFCOUNT_P(res)) {
-                                       PQresultSetInstanceData(obj->intern->res, php_pqconn_event, NULL);
-                               }
-                               zval_ptr_dtor(&res);
-                       } else {
-                               PQclear(obj->intern->res);
-                               obj->intern->res = NULL;
-                       }
+                       PQresultSetInstanceData(obj->intern->res, php_pqconn_event, NULL);
+                       PQclear(obj->intern->res);
+                       obj->intern->res = NULL;
                }
 
                if (obj->intern->iter) {
@@ -590,8 +705,29 @@ static void php_pqres_object_free(void *o TSRMLS_DC)
 static void php_pqstm_object_free(void *o TSRMLS_DC)
 {
        php_pqstm_object_t *obj = o;
-
+#if DBG_GC
+       fprintf(stderr, "FREE stm(#%d) %p (conn(#%d): %p)\n", obj->zv.handle, obj, obj->intern->conn->zv.handle, obj->intern->conn);
+#endif
        if (obj->intern) {
+               char *quoted_name = PQescapeIdentifier(obj->intern->conn->intern->conn, obj->intern->name, strlen(obj->intern->name));
+
+               php_pq_callback_dtor(&obj->intern->conn->intern->onevent);
+
+               if (quoted_name) {
+                       PGresult *res;
+                       smart_str cmd = {0};
+
+                       smart_str_appends(&cmd, "DEALLOCATE ");
+                       smart_str_appends(&cmd, quoted_name);
+                       smart_str_0(&cmd);
+                       PQfreemem(quoted_name);
+
+                       if ((res = PQexec(obj->intern->conn->intern->conn, cmd.c))) {
+                               PHP_PQclear(res);
+                       }
+                       smart_str_free(&cmd);
+               }
+
                php_pq_object_delref(obj->intern->conn TSRMLS_CC);
                efree(obj->intern->name);
                zend_hash_destroy(&obj->intern->bound);
@@ -605,8 +741,17 @@ static void php_pqstm_object_free(void *o TSRMLS_DC)
 static void php_pqtxn_object_free(void *o TSRMLS_DC)
 {
        php_pqtxn_object_t *obj = o;
-
+#if DBG_GC
+       fprintf(stderr, "FREE txn(#%d) %p (conn(#%d): %p)\n", obj->zv.handle, obj, obj->intern->conn->zv.handle, obj->intern->conn);
+#endif
        if (obj->intern) {
+               if (obj->intern->open) {
+                       PGresult *res = PQexec(obj->intern->conn->intern->conn, "ROLLBACK");
+
+                       if (res) {
+                               PHP_PQclear(res);
+                       }
+               }
                php_pq_object_delref(obj->intern->conn TSRMLS_CC);
                efree(obj->intern);
                obj->intern = NULL;
@@ -618,7 +763,9 @@ static void php_pqtxn_object_free(void *o TSRMLS_DC)
 static void php_pqcancel_object_free(void *o TSRMLS_DC)
 {
        php_pqcancel_object_t *obj = o;
-
+#if DBG_GC
+       fprintf(stderr, "FREE cancel(#%d) %p (conn(#%d): %p)\n", obj->zv.handle, obj, obj->intern->conn->zv.handle, obj->intern->conn);
+#endif
        if (obj->intern) {
                PQfreeCancel(obj->intern->cancel);
                php_pq_object_delref(obj->intern->conn TSRMLS_CC);
@@ -632,10 +779,11 @@ static void php_pqcancel_object_free(void *o TSRMLS_DC)
 static void php_pqevent_object_free(void *o TSRMLS_DC)
 {
        php_pqevent_object_t *obj = o;
-
+#if DBG_GC
+       fprintf(stderr, "FREE event(#%d) %p\n", obj->zv.handle, obj);
+#endif
        if (obj->intern) {
                php_pq_callback_dtor(&obj->intern->cb);
-               php_pq_object_delref(obj->intern->conn TSRMLS_CC);
                efree(obj->intern->type);
                efree(obj->intern);
                obj->intern = NULL;
@@ -647,7 +795,9 @@ static void php_pqevent_object_free(void *o TSRMLS_DC)
 static void php_pqlob_object_free(void *o TSRMLS_DC)
 {
        php_pqlob_object_t *obj = o;
-
+#if DBG_GC
+       fprintf(stderr, "FREE lob(#%d) %p (txn(#%d): %p)\n", obj->zv.handle, obj, obj->intern->txn->zv.handle, obj->intern->txn);
+#endif
        if (obj->intern) {
                if (obj->intern->lofd) {
                        lo_close(obj->intern->txn->intern->conn->intern->conn, obj->intern->lofd);
@@ -663,7 +813,9 @@ static void php_pqlob_object_free(void *o TSRMLS_DC)
 static void php_pqcopy_object_free(void *o TSRMLS_DC)
 {
        php_pqcopy_object_t *obj = o;
-
+#if DBG_GC
+       fprintf(stderr, "FREE copy(#%d) %p (conn(#%d): %p)\n", obj->zv.handle, obj, obj->intern->conn->zv.handle, obj->intern->conn);
+#endif
        if (obj->intern) {
                efree(obj->intern->expression);
                efree(obj->intern->options);
@@ -927,36 +1079,16 @@ static zend_object_value php_pqcopy_create_object(zend_class_entry *class_type T
        return php_pqcopy_create_object_ex(class_type, NULL, NULL TSRMLS_CC);
 }
 
-static int apply_ph_to_debug(void *p TSRMLS_DC, int argc, va_list argv, zend_hash_key *key)
-{
-       php_pq_object_prophandler_t *ph = p;
-       HashTable *ht = va_arg(argv, HashTable *);
-       zval **return_value, *object = va_arg(argv, zval *);
-       php_pq_object_t *obj = va_arg(argv, php_pq_object_t *);
-
-       if (SUCCESS == zend_hash_find(ht, key->arKey, key->nKeyLength, (void *) &return_value)) {
-
-               if (ph->read) {
-                       zval_ptr_dtor(return_value);
-                       MAKE_STD_ZVAL(*return_value);
-                       ZVAL_NULL(*return_value);
-
-                       ph->read(object, obj, *return_value TSRMLS_CC);
-               }
-       }
-
-       return ZEND_HASH_APPLY_KEEP;
-}
-
-static int apply_pi_to_debug(void *p TSRMLS_DC, int argc, va_list argv, zend_hash_key *key)
+static int apply_pi_to_ht(void *p TSRMLS_DC, int argc, va_list argv, zend_hash_key *key)
 {
        zend_property_info *pi = p;
        HashTable *ht = va_arg(argv, HashTable *);
        zval *object = va_arg(argv, zval *);
        php_pq_object_t *obj = va_arg(argv, php_pq_object_t *);
+       int addref = va_arg(argv, int);
        zval *property = zend_read_property(obj->zo.ce, object, pi->name, pi->name_length, 0 TSRMLS_CC);
 
-       if (1||!Z_REFCOUNT_P(property)) {
+       if (addref) {
                Z_ADDREF_P(property);
        }
        zend_hash_add(ht, pi->name, pi->name_length + 1, (void *) &property, sizeof(zval *), NULL);
@@ -973,8 +1105,7 @@ static HashTable *php_pq_object_debug_info(zval *object, int *temp TSRMLS_DC)
        ALLOC_HASHTABLE(ht);
        ZEND_INIT_SYMTABLE(ht);
 
-       zend_hash_apply_with_arguments(&obj->zo.ce->properties_info TSRMLS_CC, apply_pi_to_debug, 3, ht, object, obj);
-       zend_hash_apply_with_arguments(obj->prophandler TSRMLS_CC, apply_ph_to_debug, 3, ht, object, obj);
+       zend_hash_apply_with_arguments(&obj->zo.ce->properties_info TSRMLS_CC, apply_pi_to_ht, 4, ht, object, obj, 1);
 
        return ht;
 }
@@ -1070,7 +1201,15 @@ static void php_pqconn_object_write_encoding(zval *object, void *o, zval *value
        zval *zenc = value;
 
        if (Z_TYPE_P(value) != IS_STRING) {
-               convert_to_string_ex(&zenc);
+               if (Z_REFCOUNT_P(value) > 1) {
+                       zval *tmp;
+                       MAKE_STD_ZVAL(tmp);
+                       ZVAL_ZVAL(tmp, zenc, 1, 0);
+                       convert_to_string(tmp);
+                       zenc = tmp;
+               } else {
+                       convert_to_string_ex(&zenc);
+               }
        }
 
        if (0 > PQsetClientEncoding(obj->intern->conn, Z_STRVAL_P(zenc))) {
@@ -1096,7 +1235,7 @@ static void php_pqconn_object_write_unbuffered(zval *object, void *o, zval *valu
        obj->intern->unbuffered = zend_is_true(value);
 }
 
-static void php_pqconn_object_read_db(zval *objec, void *o, zval *return_value TSRMLS_DC)
+static void php_pqconn_object_read_db(zval *object, void *o, zval *return_value TSRMLS_DC)
 {
        php_pqconn_object_t *obj = o;
        char *db = PQdb(obj->intern->conn);
@@ -1108,7 +1247,7 @@ static void php_pqconn_object_read_db(zval *objec, void *o, zval *return_value T
        }
 }
 
-static void php_pqconn_object_read_user(zval *objec, void *o, zval *return_value TSRMLS_DC)
+static void php_pqconn_object_read_user(zval *object, void *o, zval *return_value TSRMLS_DC)
 {
        php_pqconn_object_t *obj = o;
        char *user = PQuser(obj->intern->conn);
@@ -1120,7 +1259,7 @@ static void php_pqconn_object_read_user(zval *objec, void *o, zval *return_value
        }
 }
 
-static void php_pqconn_object_read_pass(zval *objec, void *o, zval *return_value TSRMLS_DC)
+static void php_pqconn_object_read_pass(zval *object, void *o, zval *return_value TSRMLS_DC)
 {
        php_pqconn_object_t *obj = o;
        char *pass = PQpass(obj->intern->conn);
@@ -1132,7 +1271,7 @@ static void php_pqconn_object_read_pass(zval *objec, void *o, zval *return_value
        }
 }
 
-static void php_pqconn_object_read_host(zval *objec, void *o, zval *return_value TSRMLS_DC)
+static void php_pqconn_object_read_host(zval *object, void *o, zval *return_value TSRMLS_DC)
 {
        php_pqconn_object_t *obj = o;
        char *host = PQhost(obj->intern->conn);
@@ -1144,7 +1283,7 @@ static void php_pqconn_object_read_host(zval *objec, void *o, zval *return_value
        }
 }
 
-static void php_pqconn_object_read_port(zval *objec, void *o, zval *return_value TSRMLS_DC)
+static void php_pqconn_object_read_port(zval *object, void *o, zval *return_value TSRMLS_DC)
 {
        php_pqconn_object_t *obj = o;
        char *port = PQport(obj->intern->conn);
@@ -1156,7 +1295,7 @@ static void php_pqconn_object_read_port(zval *objec, void *o, zval *return_value
        }
 }
 
-static void php_pqconn_object_read_options(zval *objec, void *o, zval *return_value TSRMLS_DC)
+static void php_pqconn_object_read_options(zval *object, void *o, zval *return_value TSRMLS_DC)
 {
        php_pqconn_object_t *obj = o;
        char *options = PQoptions(obj->intern->conn);
@@ -1168,6 +1307,14 @@ static void php_pqconn_object_read_options(zval *objec, void *o, zval *return_va
        }
 }
 
+static void php_pqconn_object_read_event_handlers(zval *object, void *o, zval *return_value TSRMLS_DC)
+{
+       php_pqconn_object_t *obj = o;
+
+       array_init(return_value);
+       zend_hash_copy(Z_ARRVAL_P(return_value), &obj->intern->eventhandlers, (copy_ctor_func_t) zval_add_ref, NULL, sizeof(zval *));
+}
+
 static void php_pqtypes_object_read_connection(zval *object, void *o, zval *return_value TSRMLS_DC)
 {
        php_pqtypes_object_t *obj = o;
@@ -1175,7 +1322,7 @@ static void php_pqtypes_object_read_connection(zval *object, void *o, zval *retu
        php_pq_object_to_zval(obj->intern->conn, &return_value TSRMLS_CC);
 }
 
-static int has_dimension(HashTable *ht, zval *member, char **key_str, int *key_len, long *index TSRMLS_DC)
+static int has_dimension(HashTable *ht, zval *member, char **key_str, int *key_len, ulong *index TSRMLS_DC)
 {
        long lval = 0;
        zval *tmp = member;
@@ -1186,18 +1333,21 @@ static int has_dimension(HashTable *ht, zval *member, char **key_str, int *key_l
                /* no break */
        case IS_STRING:
                if (!is_numeric_string(Z_STRVAL_P(tmp), Z_STRLEN_P(tmp), &lval, NULL, 0)) {
-                       if (member != tmp) {
-                               zval_ptr_dtor(&tmp);
-                       }
+                       int exists = zend_hash_exists(ht, Z_STRVAL_P(tmp), Z_STRLEN_P(tmp) + 1);
+
                        if (key_str) {
                                *key_str = estrndup(Z_STRVAL_P(tmp), Z_STRLEN_P(tmp));
                                if (key_len) {
                                        *key_len = Z_STRLEN_P(tmp) + 1;
                                }
                        }
-                       return zend_hash_exists(ht, Z_STRVAL_P(tmp), Z_STRLEN_P(tmp) + 1);
+                       if (member != tmp) {
+                               zval_ptr_dtor(&tmp);
+                       }
+
+                       return exists;
                }
-               /* no break */
+               break;
        case IS_LONG:
                lval = Z_LVAL_P(member);
                break;
@@ -1217,7 +1367,7 @@ static int php_pqtypes_object_has_dimension(zval *object, zval *member, int chec
        php_pqtypes_object_t *obj = zend_object_store_get_object(object TSRMLS_CC);
        char *key_str = NULL;
        int key_len = 0;
-       long index = 0;
+       ulong index = 0;
 
        if (check_empty) {
                if (has_dimension(&obj->intern->types, member, &key_str, &key_len, &index TSRMLS_CC)) {
@@ -1230,11 +1380,14 @@ static int php_pqtypes_object_has_dimension(zval *object, zval *member, int chec
                                }
                                efree(key_str);
                        } else {
-                               if (SUCCESS == zend_hash_index_find(&obj->intern->types, index, (void *) data)) {
+                               if (SUCCESS == zend_hash_index_find(&obj->intern->types, index, (void *) &data)) {
                                        return Z_TYPE_PP(data) != IS_NULL;
                                }
                        }
                }
+               if (key_str) {
+                       efree(key_str);
+               }
        } else {
                return has_dimension(&obj->intern->types, member, NULL, NULL, NULL TSRMLS_CC);
        }
@@ -1244,7 +1397,7 @@ static int php_pqtypes_object_has_dimension(zval *object, zval *member, int chec
 
 static zval *php_pqtypes_object_read_dimension(zval *object, zval *member, int type TSRMLS_DC)
 {
-       long index = 0;
+       ulong index = 0;
        char *key_str = NULL;
        int key_len = 0;
        php_pqtypes_object_t *obj = zend_object_store_get_object(object TSRMLS_CC);
@@ -1262,6 +1415,9 @@ static zval *php_pqtypes_object_read_dimension(zval *object, zval *member, int t
                                return *data;
                        }
                }
+               if (key_str) {
+                       efree(key_str);
+               }
        }
 
        return NULL;
@@ -1274,6 +1430,13 @@ static void php_pqres_object_read_status(zval *object, void *o, zval *return_val
        RETVAL_LONG(PQresultStatus(obj->intern->res));
 }
 
+static void php_pqres_object_read_status_message(zval *object, void *o, zval *return_value TSRMLS_DC)
+{
+       php_pqres_object_t *obj = o;
+
+       RETVAL_STRING(PQresStatus(PQresultStatus(obj->intern->res))+sizeof("PGRES"), 1);
+}
+
 static void php_pqres_object_read_error_message(zval *object, void *o, zval *return_value TSRMLS_DC)
 {
        php_pqres_object_t *obj = o;
@@ -1323,8 +1486,16 @@ static void php_pqres_object_write_fetch_type(zval *object, void *o, zval *value
        php_pqres_object_t *obj = o;
        zval *zfetch_type = value;
 
-       if (Z_TYPE_P(zfetch_type) != IS_LONG) {
-               convert_to_long_ex(&zfetch_type);
+       if (Z_TYPE_P(value) != IS_LONG) {
+               if (Z_REFCOUNT_P(value) > 1) {
+                       zval *tmp;
+                       MAKE_STD_ZVAL(tmp);
+                       ZVAL_ZVAL(tmp, zfetch_type, 1, 0);
+                       convert_to_long(tmp);
+                       zfetch_type = tmp;
+               } else {
+                       convert_to_long_ex(&zfetch_type);
+               }
        }
 
        if (!obj->intern->iter) {
@@ -1370,14 +1541,14 @@ static void php_pqtxn_object_read_readonly(zval *object, void *o, zval *return_v
 {
        php_pqtxn_object_t *obj = o;
 
-       RETVAL_LONG(obj->intern->readonly);
+       RETVAL_BOOL(obj->intern->readonly);
 }
 
 static void php_pqtxn_object_read_deferrable(zval *object, void *o, zval *return_value TSRMLS_DC)
 {
        php_pqtxn_object_t *obj = o;
 
-       RETVAL_LONG(obj->intern->deferrable);
+       RETVAL_BOOL(obj->intern->deferrable);
 }
 
 static void php_pqtxn_object_write_isolation(zval *object, void *o, zval *value TSRMLS_DC)
@@ -1388,18 +1559,26 @@ static void php_pqtxn_object_write_isolation(zval *object, void *o, zval *value
        PGresult *res;
 
        if (Z_TYPE_P(zisolation) != IS_LONG) {
-               convert_to_long_ex(&zisolation);
+               if (Z_REFCOUNT_P(value) > 1) {
+                       zval *tmp;
+                       MAKE_STD_ZVAL(tmp);
+                       ZVAL_ZVAL(tmp, zisolation, 1, 0);
+                       convert_to_long(tmp);
+                       zisolation = tmp;
+               } else {
+                       convert_to_long_ex(&zisolation);
+               }
        }
 
        switch ((obj->intern->isolation = Z_LVAL_P(zisolation))) {
        case PHP_PQTXN_READ_COMMITTED:
-               res = PQexec(obj->intern->conn->intern->conn, "SET TRANSACTION READ COMMITED");
+               res = PQexec(obj->intern->conn->intern->conn, "SET TRANSACTION ISOLATION LEVEL READ COMMITED");
                break;
        case PHP_PQTXN_REPEATABLE_READ:
-               res = PQexec(obj->intern->conn->intern->conn, "SET TRANSACTION REPEATABLE READ");
+               res = PQexec(obj->intern->conn->intern->conn, "SET TRANSACTION ISOLATION LEVEL REPEATABLE READ");
                break;
        case PHP_PQTXN_SERIALIZABLE:
-               res = PQexec(obj->intern->conn->intern->conn, "SET TRANSACTION SERIALIZABLE");
+               res = PQexec(obj->intern->conn->intern->conn, "SET TRANSACTION ISOLATION LEVEL SERIALIZABLE");
                break;
        default:
                obj->intern->isolation = orig;
@@ -1458,13 +1637,6 @@ static void php_pqcancel_object_read_connection(zval *object, void *o, zval *ret
        php_pq_object_to_zval(obj->intern->conn, &return_value TSRMLS_CC);
 }
 
-static void php_pqevent_object_read_connection(zval *object, void *o, zval *return_value TSRMLS_DC)
-{
-       php_pqevent_object_t *obj = o;
-
-       php_pq_object_to_zval(obj->intern->conn, &return_value TSRMLS_CC);
-}
-
 static void php_pqevent_object_read_type(zval *object, void *o, zval *return_value TSRMLS_DC)
 {
        php_pqevent_object_t *obj = o;
@@ -1635,24 +1807,20 @@ static void php_pqconn_event_connreset(PGEventConnReset *event)
        }
 }
 
-static zval *result_instance_zval(PGresult *res TSRMLS_DC)
+static void php_pqres_init_instance_data(PGresult *res, php_pqres_object_t **ptr TSRMLS_DC)
 {
-       zval *rid = PQresultInstanceData(res, php_pqconn_event);
+       php_pqres_object_t *obj;
+       php_pqres_t *r = ecalloc(1, sizeof(*r));
 
-       if (!rid) {
-               php_pqres_t *r = ecalloc(1, sizeof(*r));
+       r->res = res;
+       ZEND_INIT_SYMTABLE(&r->bound);
+       php_pqres_create_object_ex(php_pqres_class_entry, r, &obj TSRMLS_CC);
 
-               MAKE_STD_ZVAL(rid);
-               r->res = res;
-               ZEND_INIT_SYMTABLE(&r->bound);
-               rid->type = IS_OBJECT;
-               rid->value.obj = php_pqres_create_object_ex(php_pqres_class_entry, r, NULL TSRMLS_CC);
+       PQresultSetInstanceData(res, php_pqconn_event, obj);
 
-               PQresultSetInstanceData(res, php_pqconn_event, rid);
+       if (ptr) {
+               *ptr = obj;
        }
-
-       Z_ADDREF_P(rid);
-       return rid;
 }
 
 static void php_pqconn_event_resultcreate(PGEventResultCreate *event)
@@ -1660,17 +1828,21 @@ static void php_pqconn_event_resultcreate(PGEventResultCreate *event)
        php_pqconn_event_data_t *data = PQinstanceData(event->conn, php_pqconn_event);
 
        if (data) {
+               php_pqres_object_t *obj;
                zval **evhs;
                TSRMLS_DF(data);
 
+               php_pqres_init_instance_data(event->result, &obj TSRMLS_CC);
+
                /* event listener */
                if (SUCCESS == zend_hash_find(&data->obj->intern->eventhandlers, ZEND_STRS("result"), (void *) &evhs)) {
-                       zval *args, *connection = NULL, *res = result_instance_zval(event->result TSRMLS_CC);
+                       zval *args, *connection = NULL, *res = NULL;
 
                        MAKE_STD_ZVAL(args);
                        array_init(args);
                        php_pq_object_to_zval(data->obj, &connection TSRMLS_CC);
                        add_next_index_zval(args, connection);
+                       php_pq_object_to_zval(obj, &res TSRMLS_CC);
                        add_next_index_zval(args, res);
                        zend_hash_apply_with_argument(Z_ARRVAL_PP(evhs), apply_event, args TSRMLS_CC);
                        zval_ptr_dtor(&args);
@@ -1678,12 +1850,23 @@ static void php_pqconn_event_resultcreate(PGEventResultCreate *event)
 
                /* async callback */
                if (data->obj->intern->onevent.fci.size > 0) {
-                       zval *res = result_instance_zval(event->result TSRMLS_CC);
+                       zval *res = NULL;
 
+                       php_pq_object_to_zval(obj, &res TSRMLS_CC);
                        zend_fcall_info_argn(&data->obj->intern->onevent.fci TSRMLS_CC, 1, &res);
                        zend_fcall_info_call(&data->obj->intern->onevent.fci, &data->obj->intern->onevent.fcc, NULL, NULL TSRMLS_CC);
                        zval_ptr_dtor(&res);
                }
+
+       }
+}
+
+static void php_pqconn_event_resultdestroy(PGEventResultDestroy *event)
+{
+       php_pqres_object_t *obj = PQresultInstanceData(event->result, php_pqconn_event);
+
+       if (obj) {
+               obj->intern->res = NULL;
        }
 }
 
@@ -1696,6 +1879,9 @@ static int php_pqconn_event(PGEventId id, void *e, void *data)
        case PGEVT_RESULTCREATE:
                php_pqconn_event_resultcreate(e);
                break;
+       case PGEVT_RESULTDESTROY:
+               php_pqconn_event_resultdestroy(e);
+               break;
        default:
                break;
        }
@@ -1762,7 +1948,7 @@ static void php_pqconn_resource_factory_dtor(void *opaque, void *handle TSRMLS_D
 {
        php_pqconn_event_data_t *evdata = PQinstanceData(handle, php_pqconn_event);
 
-       /* we don't care for anthing, except free'ing evdata */
+       /* we don't care for anything, except free'ing evdata */
        if (evdata) {
                PQsetInstanceData(handle, php_pqconn_event, NULL);
                memset(evdata, 0, sizeof(*evdata));
@@ -1780,6 +1966,7 @@ static php_resource_factory_ops_t php_pqconn_resource_factory_ops = {
 
 static void php_pqconn_wakeup(php_persistent_handle_factory_t *f, void **handle TSRMLS_DC)
 {
+       // FIXME: ping server
 }
 
 static int apply_unlisten(void *p TSRMLS_DC, int argc, va_list argv, zend_hash_key *key)
@@ -1810,6 +1997,7 @@ static void php_pqconn_notice_ignore(void *p, const PGresult *res)
 static void php_pqconn_retire(php_persistent_handle_factory_t *f, void **handle TSRMLS_DC)
 {
        php_pqconn_event_data_t *evdata = PQinstanceData(*handle, php_pqconn_event);
+       PGcancel *cancel;
        PGresult *res;
 
        /* go away */
@@ -1818,6 +2006,13 @@ static void php_pqconn_retire(php_persistent_handle_factory_t *f, void **handle
        /* ignore notices */
        PQsetNoticeReceiver(*handle, php_pqconn_notice_ignore, NULL);
 
+       /* cancel async queries */
+       if (PQisBusy(*handle) && (cancel = PQgetCancel(*handle))) {
+               char err[256] = {0};
+
+               PQcancel(cancel, err, sizeof(err));
+               PQfreeCancel(cancel);
+       }
        /* clean up async results */
        while ((res = PQgetResult(*handle))) {
                PHP_PQclear(res);
@@ -1856,77 +2051,100 @@ static PHP_METHOD(pqconn, __construct) {
        char *dsn_str = "";
        int dsn_len = 0;
        long flags = 0;
+       STATUS rv;
+
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|sl", &dsn_str, &dsn_len, &flags);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|sl", &dsn_str, &dsn_len, &flags)) {
+       if (SUCCESS == rv) {
                php_pqconn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
-               php_pqconn_event_data_t *evdata =  php_pqconn_event_data_init(obj TSRMLS_CC);
-               php_pqconn_resource_factory_data_t rfdata = {dsn_str, flags};
 
-               obj->intern = ecalloc(1, sizeof(*obj->intern));
+               if (obj->intern) {
+                       throw_exce(EX_BAD_METHODCALL TSRMLS_CC, "pq\\Connection already initialized");
+               } else {
+                       php_pqconn_event_data_t *evdata =  php_pqconn_event_data_init(obj TSRMLS_CC);
+                       php_pqconn_resource_factory_data_t rfdata = {dsn_str, flags};
 
-               zend_hash_init(&obj->intern->listeners, 0, NULL, (dtor_func_t) zend_hash_destroy, 0);
-               zend_hash_init(&obj->intern->eventhandlers, 0, NULL, ZVAL_PTR_DTOR, 0);
+                       obj->intern = ecalloc(1, sizeof(*obj->intern));
 
-               if (flags & PHP_PQCONN_PERSISTENT) {
-                       php_persistent_handle_factory_t *phf = php_persistent_handle_concede(NULL, ZEND_STRL("pq\\Connection"), dsn_str, dsn_len, php_pqconn_wakeup, php_pqconn_retire TSRMLS_CC);
-                       php_resource_factory_init(&obj->intern->factory, php_persistent_handle_get_resource_factory_ops(), phf, (void (*)(void*)) php_persistent_handle_abandon);
-               } else {
-                       php_resource_factory_init(&obj->intern->factory, &php_pqconn_resource_factory_ops, NULL, NULL);
-               }
+                       zend_hash_init(&obj->intern->listeners, 0, NULL, (dtor_func_t) zend_hash_destroy, 0);
+                       zend_hash_init(&obj->intern->eventhandlers, 0, NULL, ZVAL_PTR_DTOR, 0);
 
-               if (flags & PHP_PQCONN_ASYNC) {
-                       obj->intern->poller = (int (*)(PGconn*)) PQconnectPoll;
-               }
+                       if (flags & PHP_PQCONN_PERSISTENT) {
+                               php_persistent_handle_factory_t *phf = php_persistent_handle_concede(NULL, ZEND_STRL("pq\\Connection"), dsn_str, dsn_len, php_pqconn_wakeup, php_pqconn_retire TSRMLS_CC);
+                               php_resource_factory_init(&obj->intern->factory, php_persistent_handle_get_resource_factory_ops(), phf, (void (*)(void*)) php_persistent_handle_abandon);
+                       } else {
+                               php_resource_factory_init(&obj->intern->factory, &php_pqconn_resource_factory_ops, NULL, NULL);
+                       }
 
-               obj->intern->conn = php_resource_factory_handle_ctor(&obj->intern->factory, &rfdata TSRMLS_CC);
+                       if (flags & PHP_PQCONN_ASYNC) {
+                               obj->intern->poller = (int (*)(PGconn*)) PQconnectPoll;
+                       }
+
+                       obj->intern->conn = php_resource_factory_handle_ctor(&obj->intern->factory, &rfdata TSRMLS_CC);
 
-               PQsetInstanceData(obj->intern->conn, php_pqconn_event, evdata);
-               PQsetNoticeReceiver(obj->intern->conn, php_pqconn_notice_recv, evdata);
+                       PQsetInstanceData(obj->intern->conn, php_pqconn_event, evdata);
+                       PQsetNoticeReceiver(obj->intern->conn, php_pqconn_notice_recv, evdata);
 
-               if (SUCCESS != php_pqconn_update_socket(getThis(), obj TSRMLS_CC)) {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "Connection failed (%s)", PHP_PQerrorMessage(obj->intern->conn));
+                       if (SUCCESS != php_pqconn_update_socket(getThis(), obj TSRMLS_CC)) {
+                               throw_exce(EX_CONNECTION_FAILED TSRMLS_CC, "Connection failed (%s)", PHP_PQerrorMessage(obj->intern->conn));
+                       }
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
 ZEND_BEGIN_ARG_INFO_EX(ai_pqconn_reset, 0, 0, 0)
 ZEND_END_ARG_INFO();
 static PHP_METHOD(pqconn, reset) {
-       if (SUCCESS == zend_parse_parameters_none()) {
+       zend_error_handling zeh;
+       STATUS rv;
+
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters_none();
+       zend_restore_error_handling(&zeh TSRMLS_CC);
+
+       if (SUCCESS == rv) {
                php_pqconn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Connection not initialized");
+               } else {
                        PQreset(obj->intern->conn);
 
-                       if (CONNECTION_OK == PQstatus(obj->intern->conn)) {
-                               RETURN_TRUE;
-                       } else {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Connection reset failed: (%s)", PHP_PQerrorMessage(obj->intern->conn));
+                       if (CONNECTION_OK != PQstatus(obj->intern->conn)) {
+                               throw_exce(EX_CONNECTION_FAILED TSRMLS_CC, "Connection reset failed: (%s)", PHP_PQerrorMessage(obj->intern->conn));
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Connection not initialized");
+
+                       php_pqconn_notify_listeners(obj TSRMLS_CC);
                }
-               RETURN_FALSE;
        }
 }
 
 ZEND_BEGIN_ARG_INFO_EX(ai_pqconn_reset_async, 0, 0, 0)
 ZEND_END_ARG_INFO();
 static PHP_METHOD(pqconn, resetAsync) {
-       if (SUCCESS == zend_parse_parameters_none()) {
+       zend_error_handling zeh;
+       STATUS rv;
+
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters_none();
+       zend_restore_error_handling(&zeh TSRMLS_CC);
+
+       if (SUCCESS == rv) {
                php_pqconn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
-                       if (PQresetStart(obj->intern->conn)) {
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Connection not initialized");
+               } else {
+                       if (!PQresetStart(obj->intern->conn)) {
+                               throw_exce(EX_IO TSRMLS_CC, "Failed to start connection reset (%s)", PHP_PQerrorMessage(obj->intern->conn));
+                       } else {
                                obj->intern->poller = (int (*)(PGconn*)) PQresetPoll;
-                               RETURN_TRUE;
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Connection not initialized");
+
+                       php_pqconn_notify_listeners(obj TSRMLS_CC);
                }
-               RETURN_FALSE;
        }
 }
 
@@ -1950,48 +2168,51 @@ ZEND_BEGIN_ARG_INFO_EX(ai_pqconn_listen, 0, 0, 0)
        ZEND_ARG_INFO(0, callable)
 ZEND_END_ARG_INFO();
 static PHP_METHOD(pqconn, listen) {
+       zend_error_handling zeh;
        char *channel_str = NULL;
        int channel_len = 0;
        php_pq_callback_t listener;
+       STATUS rv;
 
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "sf", &channel_str, &channel_len, &listener.fci, &listener.fcc)) {
-               php_pqconn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "sf", &channel_str, &channel_len, &listener.fci, &listener.fcc);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
 
-               obj->intern->poller = PQconsumeInput;
+       if (SUCCESS == rv) {
+               php_pqconn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Connection not initialized");
+               } else {
                        char *quoted_channel = PQescapeIdentifier(obj->intern->conn, channel_str, channel_len);
 
-                       if (quoted_channel) {
+                       if (!quoted_channel) {
+                               throw_exce(EX_ESCAPE TSRMLS_CC, "Failed to escape channel identifier (%s)", PHP_PQerrorMessage(obj->intern->conn));
+                       } else {
                                PGresult *res;
-                               char *cmd;
+                               smart_str cmd = {0};
 
-                               spprintf(&cmd, 0, "LISTEN %s", quoted_channel);
-                               res = PQexec(obj->intern->conn, cmd);
+                               smart_str_appends(&cmd, "LISTEN ");
+                               smart_str_appends(&cmd, quoted_channel);
+                               smart_str_0(&cmd);
 
-                               efree(cmd);
+                               res = PQexec(obj->intern->conn, cmd.c);
+
+                               smart_str_free(&cmd);
                                PQfreemem(quoted_channel);
 
-                               if (res) {
+                               if (!res) {
+                                       throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to install listener (%s)", PHP_PQerrorMessage(obj->intern->conn));
+                               } else {
                                        if (SUCCESS == php_pqres_success(res TSRMLS_CC)) {
+                                               obj->intern->poller = PQconsumeInput;
                                                php_pqconn_add_listener(obj, channel_str, channel_len, &listener TSRMLS_CC);
-                                               RETVAL_TRUE;
-                                       } else {
-                                               RETVAL_FALSE;
                                        }
                                        PHP_PQclear(res);
-                               } else {
-                                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "Could not install listener (%s)", PHP_PQerrorMessage(obj->intern->conn));
-                                       RETVAL_FALSE;
                                }
 
                                php_pqconn_notify_listeners(obj TSRMLS_CC);
-                       } else {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Could not escape channel identifier (%s)", PHP_PQerrorMessage(obj->intern->conn));
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Connection not initialized");
-                       RETVAL_FALSE;
                }
        }
 }
@@ -2001,42 +2222,44 @@ ZEND_BEGIN_ARG_INFO_EX(ai_pqconn_listen_async, 0, 0, 0)
        ZEND_ARG_INFO(0, callable)
 ZEND_END_ARG_INFO();
 static PHP_METHOD(pqconn, listenAsync) {
+       zend_error_handling zeh;
        char *channel_str = NULL;
        int channel_len = 0;
        php_pq_callback_t listener;
+       STATUS rv;
 
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "sf", &channel_str, &channel_len, &listener.fci, &listener.fcc)) {
-               php_pqconn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "sf", &channel_str, &channel_len, &listener.fci, &listener.fcc);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
 
-               obj->intern->poller = PQconsumeInput;
+       if (SUCCESS == rv) {
+               php_pqconn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Connection not initialized");
+               } else {
                        char *quoted_channel = PQescapeIdentifier(obj->intern->conn, channel_str, channel_len);
 
-                       if (quoted_channel) {
-                               char *cmd;
+                       if (!quoted_channel) {
+                               throw_exce(EX_ESCAPE TSRMLS_CC, "Failed to escape channel identifier (%s)", PHP_PQerrorMessage(obj->intern->conn));
+                       } else {
+                               smart_str cmd = {0};
 
-                               obj->intern->poller = PQconsumeInput;
+                               smart_str_appends(&cmd, "LISTEN ");
+                               smart_str_appends(&cmd, quoted_channel);
+                               smart_str_0(&cmd);
 
-                               spprintf(&cmd, 0, "LISTEN %s", channel_str);
-                               if (PQsendQuery(obj->intern->conn, cmd)) {
-                                       php_pqconn_add_listener(obj, channel_str, channel_len, &listener TSRMLS_CC);
-                                       RETVAL_TRUE;
+                               if (!PQsendQuery(obj->intern->conn, cmd.c)) {
+                                       throw_exce(EX_IO TSRMLS_CC, "Failed to install listener (%s)", PHP_PQerrorMessage(obj->intern->conn));
                                } else {
-                                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "Could not install listener (%s)", PHP_PQerrorMessage(obj->intern->conn));
-                                       RETVAL_FALSE;
+                                       obj->intern->poller = PQconsumeInput;
+                                       php_pqconn_add_listener(obj, channel_str, channel_len, &listener TSRMLS_CC);
                                }
 
-                               efree(cmd);
+                               smart_str_free(&cmd);
                                PQfreemem(quoted_channel);
-
                                php_pqconn_notify_listeners(obj TSRMLS_CC);
-                       } else {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Could not escape channel identifier (%s)", PHP_PQerrorMessage(obj->intern->conn));
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Connection not initialized");
-                       RETVAL_FALSE;
                }
        }
 }
@@ -2046,35 +2269,34 @@ ZEND_BEGIN_ARG_INFO_EX(ai_pqconn_notify, 0, 0, 2)
        ZEND_ARG_INFO(0, message)
 ZEND_END_ARG_INFO();
 static PHP_METHOD(pqconn, notify) {
+       zend_error_handling zeh;
        char *channel_str, *message_str;
        int channel_len, message_len;
+       STATUS rv;
+
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ss", &channel_str, &channel_len, &message_str, &message_len);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
 
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ss", &channel_str, &channel_len, &message_str, &message_len)) {
+       if (SUCCESS == rv) {
                php_pqconn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Connection not initialized");
+               } else {
                        PGresult *res;
                        char *params[2] = {channel_str, message_str};
 
                        res = PQexecParams(obj->intern->conn, "select pg_notify($1, $2)", 2, NULL, (const char *const*) params, NULL, NULL, 0);
 
-                       if (res) {
-                               if (SUCCESS == php_pqres_success(res TSRMLS_CC)) {
-                                       RETVAL_TRUE;
-                               } else {
-                                       RETVAL_FALSE;
-                               }
-                               PHP_PQclear(res);
+                       if (!res) {
+                               throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to notify listeners (%s)", PHP_PQerrorMessage(obj->intern->conn));
                        } else {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Could not notify listeners (%s)", PHP_PQerrorMessage(obj->intern->conn));
-                               RETVAL_FALSE;
+                               php_pqres_success(res TSRMLS_CC);
+                               PHP_PQclear(res);
                        }
 
                        php_pqconn_notify_listeners(obj TSRMLS_CC);
-
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Connection not initialized");
-                       RETVAL_FALSE;
                }
        }
 }
@@ -2084,29 +2306,30 @@ ZEND_BEGIN_ARG_INFO_EX(ai_pqconn_notify_async, 0, 0, 2)
        ZEND_ARG_INFO(0, message)
 ZEND_END_ARG_INFO();
 static PHP_METHOD(pqconn, notifyAsync) {
+       zend_error_handling zeh;
        char *channel_str, *message_str;
        int channel_len, message_len;
+       STATUS rv;
 
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ss", &channel_str, &channel_len, &message_str, &message_len)) {
-               php_pqconn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ss", &channel_str, &channel_len, &message_str, &message_len);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
 
-               if (obj->intern) {
-                       char *params[2] = {channel_str, message_str};
+       if (SUCCESS == rv) {
+               php_pqconn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-                       obj->intern->poller = PQconsumeInput;
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Connection not initialized");
+               } else {
+                       char *params[2] = {channel_str, message_str};
 
-                       if (PQsendQueryParams(obj->intern->conn, "select pg_notify($1, $2)", 2, NULL, (const char *const*) params, NULL, NULL, 0)) {
-                               RETVAL_TRUE;
+                       if (!PQsendQueryParams(obj->intern->conn, "select pg_notify($1, $2)", 2, NULL, (const char *const*) params, NULL, NULL, 0)) {
+                               throw_exce(EX_IO TSRMLS_CC, "Failed to notify listeners (%s)", PHP_PQerrorMessage(obj->intern->conn));
                        } else {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Could not notify listeners (%s)", PHP_PQerrorMessage(obj->intern->conn));
-                               RETVAL_FALSE;
+                               obj->intern->poller = PQconsumeInput;
                        }
 
                        php_pqconn_notify_listeners(obj TSRMLS_CC);
-
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Connection not initialized");
-                       RETVAL_FALSE;
                }
        }
 }
@@ -2114,25 +2337,28 @@ static PHP_METHOD(pqconn, notifyAsync) {
 ZEND_BEGIN_ARG_INFO_EX(ai_pqconn_poll, 0, 0, 0)
 ZEND_END_ARG_INFO();
 static PHP_METHOD(pqconn, poll) {
-       if (SUCCESS == zend_parse_parameters_none()) {
+       zend_error_handling zeh;
+       STATUS rv;
+
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters_none();
+       zend_restore_error_handling(&zeh TSRMLS_CC);
+
+       if (SUCCESS == rv) {
                php_pqconn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
-                       if (obj->intern->poller) {
-                               if (obj->intern->poller == PQconsumeInput) {
-                                       RETVAL_LONG(obj->intern->poller(obj->intern->conn) * PGRES_POLLING_OK);
-                                       php_pqconn_notify_listeners(obj TSRMLS_CC);
-                                       return;
-                               } else {
-                                       RETURN_LONG(obj->intern->poller(obj->intern->conn));
-                               }
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Connection not initialized");
+               } else if (!obj->intern->poller) {
+                       throw_exce(EX_RUNTIME TSRMLS_CC, "No asynchronous operation active");
+               } else {
+                       if (obj->intern->poller == PQconsumeInput) {
+                               RETVAL_LONG(obj->intern->poller(obj->intern->conn) * PGRES_POLLING_OK);
                        } else {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "No asynchronous operation active");
+                               RETVAL_LONG(obj->intern->poller(obj->intern->conn));
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Connection not initialized");
+                       php_pqconn_notify_listeners(obj TSRMLS_CC);
                }
-               RETURN_FALSE;
        }
 }
 
@@ -2143,57 +2369,58 @@ static PHP_METHOD(pqconn, exec) {
        zend_error_handling zeh;
        char *query_str;
        int query_len;
+       STATUS rv;
+
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &query_str, &query_len);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &query_str, &query_len)) {
+       if (SUCCESS == rv) {
                php_pqconn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Connection not initialized");
+               } else {
                        PGresult *res = PQexec(obj->intern->conn, query_str);
 
-                       php_pqconn_notify_listeners(obj TSRMLS_CC);
-
-                       if (res) {
-                               if (SUCCESS == php_pqres_success(res TSRMLS_CC)) {
-                                       php_pqres_t *r = ecalloc(1, sizeof(*r));
-
-                                       r->res = res;
-                                       ZEND_INIT_SYMTABLE(&r->bound);
-                                       return_value->type = IS_OBJECT;
-                                       return_value->value.obj = php_pqres_create_object_ex(php_pqres_class_entry, r, NULL TSRMLS_CC);
-                               }
+                       if (!res) {
+                               throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to execute query (%s)", PHP_PQerrorMessage(obj->intern->conn));
+                       } else if (SUCCESS == php_pqres_success(res TSRMLS_CC)) {
+                               php_pq_object_to_zval_no_addref(PQresultInstanceData(res, php_pqconn_event), &return_value TSRMLS_CC);
                        } else {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Could not execute query (%s)", PHP_PQerrorMessage(obj->intern->conn));
+                               PHP_PQclear(res);
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Connection not initialized");
+
+                       php_pqconn_notify_listeners(obj TSRMLS_CC);
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
 ZEND_BEGIN_ARG_INFO_EX(ai_pqconn_get_result, 0, 0, 0)
 ZEND_END_ARG_INFO();
 static PHP_METHOD(pqconn, getResult) {
-       if (SUCCESS == zend_parse_parameters_none()) {
+       zend_error_handling zeh;
+       STATUS rv;
+
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters_none();
+       zend_restore_error_handling(&zeh TSRMLS_CC);
+
+       if (SUCCESS == rv) {
                php_pqconn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Connectio not initialized");
+               } else {
                        PGresult *res = PQgetResult(obj->intern->conn);
 
-                       if (res) {
-                               php_pqres_t *r = ecalloc(1, sizeof(*r));
-
-                               r->res = res;
-                               ZEND_INIT_SYMTABLE(&r->bound);
-                               return_value->type = IS_OBJECT;
-                               return_value->value.obj = php_pqres_create_object_ex(php_pqres_class_entry, r, NULL TSRMLS_CC);
-                       } else {
+                       if (!res) {
                                RETVAL_NULL();
+                       } else {
+                               php_pq_object_to_zval_no_addref(PQresultInstanceData(res, php_pqconn_event), &return_value TSRMLS_CC);
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Connection not initialized");
-                       RETVAL_FALSE;
+
+                       php_pqconn_notify_listeners(obj TSRMLS_CC);
                }
        }
 }
@@ -2207,37 +2434,31 @@ static PHP_METHOD(pqconn, execAsync) {
        php_pq_callback_t resolver = {{0}};
        char *query_str;
        int query_len;
+       STATUS rv;
+
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|f", &query_str, &query_len, &resolver.fci, &resolver.fcc);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|f", &query_str, &query_len, &resolver.fci, &resolver.fcc)) {
+       if (SUCCESS == rv) {
                php_pqconn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Connection not initialized");
+               } else if (!PQsendQuery(obj->intern->conn, query_str)) {
+                       throw_exce(EX_IO TSRMLS_CC, "Failed to execute query (%s)", PHP_PQerrorMessage(obj->intern->conn));
+               } else if (obj->intern->unbuffered && !PQsetSingleRowMode(obj->intern->conn)) {
+                       throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to enable unbuffered mode (%s)", PHP_PQerrorMessage(obj->intern->conn));
+               } else {
+                       obj->intern->poller = PQconsumeInput;
                        php_pq_callback_dtor(&obj->intern->onevent);
                        if (resolver.fci.size > 0) {
                                obj->intern->onevent = resolver;
                                php_pq_callback_addref(&obj->intern->onevent);
                        }
-
-                       obj->intern->poller = PQconsumeInput;
-
-                       if (PQsendQuery(obj->intern->conn, query_str)) {
-                               if (obj->intern->unbuffered) {
-                                       if (!PQsetSingleRowMode(obj->intern->conn)) {
-                                               php_error_docref(NULL TSRMLS_CC, E_NOTICE, "Could not enable unbuffered mode (%s)", PHP_PQerrorMessage(obj->intern->conn));
-                                       }
-                               }
-                               RETVAL_TRUE;
-                       } else {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Could not execute query (%s)", PHP_PQerrorMessage(obj->intern->conn));
-                               RETVAL_FALSE;
-                       }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Connection not initialized");
-                       RETVAL_FALSE;
+                       php_pqconn_notify_listeners(obj TSRMLS_CC);
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
 static int apply_to_oid(void *p, void *arg TSRMLS_DC)
@@ -2348,12 +2569,18 @@ static PHP_METHOD(pqconn, execParams) {
        int query_len;
        zval *zparams;
        zval *ztypes = NULL;
+       STATUS rv;
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "sa/|a/!", &query_str, &query_len, &zparams, &ztypes)) {
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "sa/|a/!", &query_str, &query_len, &zparams, &ztypes);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
+
+       if (SUCCESS == rv) {
                php_pqconn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Connection not initialized");
+               } else {
                        PGresult *res;
                        int count;
                        Oid *types = NULL;
@@ -2377,27 +2604,19 @@ static PHP_METHOD(pqconn, execParams) {
                                efree(params);
                        }
 
-                       php_pqconn_notify_listeners(obj TSRMLS_CC);
-
-                       if (res) {
+                       if (!res) {
+                               throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to execute query (%s)", PHP_PQerrorMessage(obj->intern->conn));
+                       } else {
                                if (SUCCESS == php_pqres_success(res TSRMLS_CC)) {
-                                       php_pqres_t *r = ecalloc(1, sizeof(*r));
-
-                                       r->res = res;
-                                       ZEND_INIT_SYMTABLE(&r->bound);
-                                       return_value->type = IS_OBJECT;
-                                       return_value->value.obj = php_pqres_create_object_ex(php_pqres_class_entry, r, NULL TSRMLS_CC);
+                                       php_pq_object_to_zval_no_addref(PQresultInstanceData(res, php_pqconn_event), &return_value TSRMLS_CC);
+                               } else {
+                                       PHP_PQclear(res);
                                }
-                       } else {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Could not execute query (%s)", PHP_PQerrorMessage(obj->intern->conn));
-                               RETVAL_FALSE;
+
+                               php_pqconn_notify_listeners(obj TSRMLS_CC);
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Connection not initialized");
-                       RETVAL_FALSE;
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
 ZEND_BEGIN_ARG_INFO_EX(ai_pqconn_exec_params_async, 0, 0, 2)
@@ -2413,12 +2632,18 @@ static PHP_METHOD(pqconn, execParamsAsync) {
        int query_len;
        zval *zparams;
        zval *ztypes = NULL;
+       STATUS rv;
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "sa/|a/!f", &query_str, &query_len, &zparams, &ztypes, &resolver.fci, &resolver.fcc)) {
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "sa/|a/!f", &query_str, &query_len, &zparams, &ztypes, &resolver.fci, &resolver.fcc);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
+
+       if (SUCCESS == rv) {
                php_pqconn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Connection not initialized");
+               } else {
                        int count;
                        Oid *types = NULL;
                        char **params = NULL;
@@ -2431,24 +2656,18 @@ static PHP_METHOD(pqconn, execParamsAsync) {
                                php_pq_types_to_array(Z_ARRVAL_P(ztypes), &types TSRMLS_CC);
                        }
 
-                       php_pq_callback_dtor(&obj->intern->onevent);
-                       if (resolver.fci.size > 0) {
-                               obj->intern->onevent = resolver;
-                               php_pq_callback_addref(&obj->intern->onevent);
-                       }
-
-                       obj->intern->poller = PQconsumeInput;
-
-                       if (PQsendQueryParams(obj->intern->conn, query_str, count, types, (const char *const*) params, NULL, NULL, 0)) {
-                               if (obj->intern->unbuffered) {
-                                       if (!PQsetSingleRowMode(obj->intern->conn)) {
-                                               php_error_docref(NULL TSRMLS_CC, E_NOTICE, "Could not enable unbuffered mode (%s)", PHP_PQerrorMessage(obj->intern->conn));
-                                       }
-                               }
-                               RETVAL_TRUE;
+                       if (!PQsendQueryParams(obj->intern->conn, query_str, count, types, (const char *const*) params, NULL, NULL, 0)) {
+                               throw_exce(EX_IO TSRMLS_CC, "Failed to execute query (%s)", PHP_PQerrorMessage(obj->intern->conn));
+                       } else if (obj->intern->unbuffered && !PQsetSingleRowMode(obj->intern->conn)) {
+                               throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to enable unbuffered mode (%s)", PHP_PQerrorMessage(obj->intern->conn));
                        } else {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Could not execute query (%s)", PHP_PQerrorMessage(obj->intern->conn));
-                               RETVAL_FALSE;
+                               obj->intern->poller = PQconsumeInput;
+                               php_pq_callback_dtor(&obj->intern->onevent);
+                               if (resolver.fci.size > 0) {
+                                       obj->intern->onevent = resolver;
+                                       php_pq_callback_addref(&obj->intern->onevent);
+                               }
+                               php_pqconn_notify_listeners(obj TSRMLS_CC);
                        }
 
                        zend_hash_destroy(&zdtor);
@@ -2458,12 +2677,6 @@ static PHP_METHOD(pqconn, execParamsAsync) {
                        if (params) {
                                efree(params);
                        }
-
-                       php_pqconn_notify_listeners(obj TSRMLS_CC);
-
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Connection not initialized");
-                       RETVAL_FALSE;
                }
        }
        zend_restore_error_handling(&zeh TSRMLS_CC);
@@ -2491,12 +2704,13 @@ static STATUS php_pqconn_prepare(zval *object, php_pqconn_object_t *obj, const c
                efree(types);
        }
 
-       if (res) {
+       if (!res) {
+               rv = FAILURE;
+               throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to prepare statement (%s)", PHP_PQerrorMessage(obj->intern->conn));
+       } else {
                rv = php_pqres_success(res TSRMLS_CC);
                PHP_PQclear(res);
-       } else {
-               rv = FAILURE;
-               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Could not prepare statement (%s)", PHP_PQerrorMessage(obj->intern->conn));
+               php_pqconn_notify_listeners(obj TSRMLS_CC);
        }
        
        return rv;
@@ -2512,29 +2726,29 @@ static PHP_METHOD(pqconn, prepare) {
        zval *ztypes = NULL;
        char *name_str, *query_str;
        int name_len, *query_len;
+       STATUS rv;
+
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ss|a/!", &name_str, &name_len, &query_str, &query_len, &ztypes);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ss|a/!", &name_str, &name_len, &query_str, &query_len, &ztypes)) {
+       if (SUCCESS == rv) {
                php_pqconn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
-                       if (SUCCESS == php_pqconn_prepare(getThis(), obj, name_str, query_str, ztypes ? Z_ARRVAL_P(ztypes) : NULL TSRMLS_CC)) {
-                               php_pqstm_t *stm = ecalloc(1, sizeof(*stm));
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Connection not initialized");
+               } else if (SUCCESS == php_pqconn_prepare(getThis(), obj, name_str, query_str, ztypes ? Z_ARRVAL_P(ztypes) : NULL TSRMLS_CC)) {
+                       php_pqstm_t *stm = ecalloc(1, sizeof(*stm));
 
-                               php_pq_object_addref(obj TSRMLS_CC);
-                               stm->conn = obj;
-                               stm->name = estrdup(name_str);
-                               ZEND_INIT_SYMTABLE(&stm->bound);
+                       php_pq_object_addref(obj TSRMLS_CC);
+                       stm->conn = obj;
+                       stm->name = estrdup(name_str);
+                       ZEND_INIT_SYMTABLE(&stm->bound);
 
-                               return_value->type = IS_OBJECT;
-                               return_value->value.obj = php_pqstm_create_object_ex(php_pqstm_class_entry, stm, NULL TSRMLS_CC);
-                       }
-                       php_pqconn_notify_listeners(obj TSRMLS_CC);
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Connection not initialized");
+                       return_value->type = IS_OBJECT;
+                       return_value->value.obj = php_pqstm_create_object_ex(php_pqstm_class_entry, stm, NULL TSRMLS_CC);
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
 static STATUS php_pqconn_prepare_async(zval *object, php_pqconn_object_t *obj, const char *name, const char *query, HashTable *typest TSRMLS_DC)
@@ -2551,16 +2765,16 @@ static STATUS php_pqconn_prepare_async(zval *object, php_pqconn_object_t *obj, c
                count = php_pq_types_to_array(typest, &types TSRMLS_CC);
        }
        
-       if (PQsendPrepare(obj->intern->conn, name, query, count, types)) {
-               if (obj->intern->unbuffered) {
-                       if (!PQsetSingleRowMode(obj->intern->conn)) {
-                               php_error_docref(NULL TSRMLS_CC, E_NOTICE, "Could not enable unbuffered mode (%s)", PHP_PQerrorMessage(obj->intern->conn));
-                       }
-               }
-               rv = SUCCESS;
-       } else {
-               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Could not prepare statement (%s)", PHP_PQerrorMessage(obj->intern->conn));
+       if (!PQsendPrepare(obj->intern->conn, name, query, count, types)) {
                rv = FAILURE;
+               throw_exce(EX_IO TSRMLS_CC, "Failed to prepare statement (%s)", PHP_PQerrorMessage(obj->intern->conn));
+       } else if (obj->intern->unbuffered && !PQsetSingleRowMode(obj->intern->conn)) {
+               rv = FAILURE;
+               throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to enable unbuffered mode (%s)", PHP_PQerrorMessage(obj->intern->conn));
+       } else {
+               rv = SUCCESS;
+               obj->intern->poller = PQconsumeInput;
+               php_pqconn_notify_listeners(obj TSRMLS_CC);
        }
        
        if (types) {
@@ -2580,30 +2794,29 @@ static PHP_METHOD(pqconn, prepareAsync) {
        zval *ztypes = NULL;
        char *name_str, *query_str;
        int name_len, *query_len;
+       STATUS rv;
+
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ss|a/!", &name_str, &name_len, &query_str, &query_len, &ztypes);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ss|a/!", &name_str, &name_len, &query_str, &query_len, &ztypes)) {
+       if (SUCCESS == rv) {
                php_pqconn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
-                       obj->intern->poller = PQconsumeInput;
-                       if (SUCCESS == php_pqconn_prepare_async(getThis(), obj, name_str, query_str, ztypes ? Z_ARRVAL_P(ztypes) : NULL TSRMLS_CC)) {
-                               php_pqstm_t *stm = ecalloc(1, sizeof(*stm));
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Connection not initialized");
+               } else if (SUCCESS == php_pqconn_prepare_async(getThis(), obj, name_str, query_str, ztypes ? Z_ARRVAL_P(ztypes) : NULL TSRMLS_CC)) {
+                       php_pqstm_t *stm = ecalloc(1, sizeof(*stm));
 
-                               php_pq_object_addref(obj TSRMLS_CC);
-                               stm->conn = obj;
-                               stm->name = estrdup(name_str);
-                               ZEND_INIT_SYMTABLE(&stm->bound);
+                       php_pq_object_addref(obj TSRMLS_CC);
+                       stm->conn = obj;
+                       stm->name = estrdup(name_str);
+                       ZEND_INIT_SYMTABLE(&stm->bound);
 
-                               return_value->type = IS_OBJECT;
-                               return_value->value.obj = php_pqstm_create_object_ex(php_pqstm_class_entry, stm, NULL TSRMLS_CC);
-                       }
-                       php_pqconn_notify_listeners(obj TSRMLS_CC);
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Connection not initialized");
+                       return_value->type = IS_OBJECT;
+                       return_value->value.obj = php_pqstm_create_object_ex(php_pqstm_class_entry, stm, NULL TSRMLS_CC);
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
 ZEND_BEGIN_ARG_INFO_EX(ai_pqconn_quote, 0, 0, 1)
@@ -2616,19 +2829,18 @@ static PHP_METHOD(pqconn, quote) {
        if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &str, &len)) {
                php_pqconn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Connection not initialized");
+               } else {
                        char *quoted = PQescapeLiteral(obj->intern->conn, str, len);
 
-                       if (quoted) {
+                       if (!quoted) {
+                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to quote string (%s)", PHP_PQerrorMessage(obj->intern->conn));
+                               RETVAL_FALSE;
+                       } else {
                                RETVAL_STRING(quoted, 1);
                                PQfreemem(quoted);
-                       } else {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Could not quote string (%s)", PHP_PQerrorMessage(obj->intern->conn));
-                               RETVAL_FALSE;
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Connection not initialized");
-                       RETVAL_FALSE;
                }
        }
 }
@@ -2643,19 +2855,18 @@ static PHP_METHOD(pqconn, quoteName) {
        if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &str, &len)) {
                php_pqconn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Connection not initialized");
+               } else {
                        char *quoted = PQescapeIdentifier(obj->intern->conn, str, len);
 
-                       if (quoted) {
+                       if (!quoted) {
+                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to quote name (%s)", PHP_PQerrorMessage(obj->intern->conn));
+                               RETVAL_FALSE;
+                       } else {
                                RETVAL_STRING(quoted, 1);
                                PQfreemem(quoted);
-                       } else {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Could not quote name (%s)", PHP_PQerrorMessage(obj->intern->conn));
-                               RETVAL_FALSE;
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Connection not initialized");
-                       RETVAL_FALSE;
                }
        }
 }
@@ -2670,20 +2881,19 @@ static PHP_METHOD(pqconn, escapeBytea) {
        if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &str, &len)) {
                php_pqconn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Connection not initialized");
+               } else {
                        size_t escaped_len;
                        char *escaped_str = (char *) PQescapeByteaConn(obj->intern->conn, (unsigned char *) str, len, &escaped_len);
 
-                       if (escaped_str) {
+                       if (!escaped_str) {
+                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to escape bytea (%s)", PHP_PQerrorMessage(obj->intern->conn));
+                               RETVAL_FALSE;
+                       } else {
                                RETVAL_STRINGL(escaped_str, escaped_len - 1, 1);
                                PQfreemem(escaped_str);
-                       } else {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Could not escape bytea (%s)", PHP_PQerrorMessage(obj->intern->conn));
-                               RETVAL_FALSE;
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Connection not initialized");
-                       RETVAL_FALSE;
                }
        }
 }
@@ -2698,20 +2908,19 @@ static PHP_METHOD(pqconn, unescapeBytea) {
        if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &str, &len)) {
                php_pqconn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Connection not initialized");
+               } else {
                        size_t unescaped_len;
                        char *unescaped_str = (char *) PQunescapeBytea((unsigned char *)str, &unescaped_len);
 
-                       if (unescaped_str) {
+                       if (!unescaped_str) {
+                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to unescape bytea (%s)", PHP_PQerrorMessage(obj->intern->conn));
+                               RETVAL_FALSE;
+                       } else {
                                RETVAL_STRINGL(unescaped_str, unescaped_len, 1);
                                PQfreemem(unescaped_str);
-                       } else {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Could not unescape bytea (%s)", PHP_PQerrorMessage(obj->intern->conn));
-                               RETVAL_FALSE;
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Connection not initialized");
-                       RETVAL_FALSE;
                }
        }
 }
@@ -2732,61 +2941,79 @@ static const char *isolation_level(long *isolation) {
 
 static STATUS php_pqconn_start_transaction(zval *zconn, php_pqconn_object_t *conn_obj, long isolation, zend_bool readonly, zend_bool deferrable TSRMLS_DC)
 {
+       STATUS rv = FAILURE;
+
        if (!conn_obj) {
                conn_obj = zend_object_store_get_object(zconn TSRMLS_CC);
        }
 
-       if (conn_obj->intern) {
+       if (!conn_obj->intern) {
+               throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Connection not initialized");
+       } else {
                PGresult *res;
-               char *cmd;
-
-               spprintf(&cmd, 0, "START TRANSACTION ISOLATION LEVEL %s, READ %s, %s DEFERRABLE",
-                               isolation_level(&isolation), readonly ? "ONLY" : "WRITE", deferrable ? "": "NOT");
-
-               res = PQexec(conn_obj->intern->conn, cmd);
-
-               efree(cmd);
-
-               if (res) {
-                       STATUS rv = php_pqres_success(res TSRMLS_CC);
-
-                       PHP_PQclear(res);
-                       return rv;
+               smart_str cmd = {0};
+               const char *il = isolation_level(&isolation);
+
+               smart_str_appends(&cmd, "START TRANSACTION ISOLATION LEVEL ");
+               smart_str_appends(&cmd, il);
+               smart_str_appends(&cmd, ", READ ");
+               smart_str_appends(&cmd, readonly ? "ONLY" : "WRITE");
+               smart_str_appends(&cmd, ",");
+               smart_str_appends(&cmd, deferrable ? "" : " NOT");
+               smart_str_appends(&cmd, " DEFERRABLE");
+               smart_str_0(&cmd);
+
+               res = PQexec(conn_obj->intern->conn, cmd.c);
+
+               if (!res) {
+                       throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to start transaction (%s)", PHP_PQerrorMessage(conn_obj->intern->conn));
                } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "Could not start transaction (%s)", PHP_PQerrorMessage(conn_obj->intern->conn));
-                       return FAILURE;
+                       rv = php_pqres_success(res TSRMLS_CC);
+                       PHP_PQclear(res);
+                       php_pqconn_notify_listeners(conn_obj TSRMLS_CC);
                }
-       } else {
-               php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Connection not initialized");
-               return FAILURE;
+
+               smart_str_free(&cmd);
        }
+
+       return rv;
 }
 
 static STATUS php_pqconn_start_transaction_async(zval *zconn, php_pqconn_object_t *conn_obj, long isolation, zend_bool readonly, zend_bool deferrable TSRMLS_DC)
 {
+       STATUS rv = FAILURE;
+
        if (!conn_obj) {
                conn_obj = zend_object_store_get_object(zconn TSRMLS_CC);
        }
 
-       if (conn_obj->intern->conn) {
-               char *cmd;
-
-               spprintf(&cmd, 0, "START TRANSACTION ISOLATION LEVEL %s, READ %s, %s DEFERRABLE",
-                               isolation_level(&isolation), readonly ? "ONLY" : "WRITE", deferrable ? "": "NOT");
-
-               if (PQsendQuery(conn_obj->intern->conn, cmd)) {
-                       conn_obj->intern->poller = PQconsumeInput;
-                       efree(cmd);
-                       return SUCCESS;
+       if (!conn_obj->intern) {
+               throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Connection not initialized");
+       } else {
+               smart_str cmd = {0};
+               const char *il = isolation_level(&isolation);
+
+               smart_str_appends(&cmd, "START TRANSACTION ISOLATION LEVEL ");
+               smart_str_appends(&cmd, il);
+               smart_str_appends(&cmd, ", READ ");
+               smart_str_appends(&cmd, readonly ? "ONLY" : "WRITE");
+               smart_str_appends(&cmd, ",");
+               smart_str_appends(&cmd, deferrable ? "" : "NOT ");
+               smart_str_appends(&cmd, " DEFERRABLE");
+               smart_str_0(&cmd);
+
+               if (!PQsendQuery(conn_obj->intern->conn, cmd.c)) {
+                       throw_exce(EX_IO TSRMLS_CC, "Failed to start transaction (%s)", PHP_PQerrorMessage(conn_obj->intern->conn));
                } else {
-                       efree(cmd);
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "Could not start transaction (%s)", PHP_PQerrorMessage(conn_obj->intern->conn));
-                       return FAILURE;
+                       rv = SUCCESS;
+                       conn_obj->intern->poller = PQconsumeInput;
+                       php_pqconn_notify_listeners(conn_obj TSRMLS_CC);
                }
-       } else {
-               php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Connection not initialized");
-               return FAILURE;
+
+               smart_str_free(&cmd);
        }
+
+       return rv;
 }
 
 ZEND_BEGIN_ARG_INFO_EX(ai_pqconn_start_transaction, 0, 0, 0)
@@ -2798,10 +3025,13 @@ static PHP_METHOD(pqconn, startTransaction) {
        zend_error_handling zeh;
        long isolation = PHP_PQTXN_READ_COMMITTED;
        zend_bool readonly = 0, deferrable = 0;
+       STATUS rv;
+
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|lbb", &isolation, &readonly, &deferrable);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|lbb", &isolation, &readonly, &deferrable)) {
-               STATUS rv;
+       if (SUCCESS == rv) {
                php_pqconn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
                rv = php_pqconn_start_transaction(getThis(), obj, isolation, readonly, deferrable TSRMLS_CC);
@@ -2811,6 +3041,7 @@ static PHP_METHOD(pqconn, startTransaction) {
 
                        php_pq_object_addref(obj TSRMLS_CC);
                        txn->conn = obj;
+                       txn->open = 1;
                        txn->isolation = isolation;
                        txn->readonly = readonly;
                        txn->deferrable = deferrable;
@@ -2819,10 +3050,8 @@ static PHP_METHOD(pqconn, startTransaction) {
                        return_value->value.obj = php_pqtxn_create_object_ex(php_pqtxn_class_entry, txn, NULL TSRMLS_CC);
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
-
 ZEND_BEGIN_ARG_INFO_EX(ai_pqconn_start_transaction_async, 0, 0, 0)
        ZEND_ARG_INFO(0, isolation)
        ZEND_ARG_INFO(0, readonly)
@@ -2832,10 +3061,12 @@ static PHP_METHOD(pqconn, startTransactionAsync) {
        zend_error_handling zeh;
        long isolation = PHP_PQTXN_READ_COMMITTED;
        zend_bool readonly = 0, deferrable = 0;
+       STATUS rv;
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|lbb", &isolation, &readonly, &deferrable)) {
-               STATUS rv;
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|lbb", &isolation, &readonly, &deferrable);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
+       if (SUCCESS == rv) {
                php_pqconn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
                rv = php_pqconn_start_transaction_async(getThis(), obj, isolation, readonly, deferrable TSRMLS_CC);
@@ -2853,7 +3084,6 @@ static PHP_METHOD(pqconn, startTransactionAsync) {
                        return_value->value.obj = php_pqtxn_create_object_ex(php_pqtxn_class_entry, txn, NULL TSRMLS_CC);
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
 ZEND_BEGIN_ARG_INFO_EX(ai_pqconn_trace, 0, 0, 0)
@@ -2864,27 +3094,27 @@ static PHP_METHOD(pqconn, trace) {
 
        if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|r!", &zstream)) {
                php_pqconn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
-               if (obj->intern) {
-                       if (zstream) {
+
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Connection not initialized");
+               } else {
+                       if (!zstream) {
+                               PQuntrace(obj->intern->conn);
+                               RETVAL_TRUE;
+                       } else {
                                FILE *fp;
                                php_stream *stream = NULL;
 
                                php_stream_from_zval(stream, &zstream);
 
-                               if (SUCCESS == php_stream_cast(stream, PHP_STREAM_AS_STDIO, (void *) &fp, REPORT_ERRORS)) {
+                               if (SUCCESS != php_stream_cast(stream, PHP_STREAM_AS_STDIO, (void *) &fp, REPORT_ERRORS)) {
+                                       RETVAL_FALSE;
+                               } else {
                                        stream->flags |= PHP_STREAM_FLAG_NO_CLOSE;
                                        PQtrace(obj->intern->conn, fp);
                                        RETVAL_TRUE;
-                               } else {
-                                       RETVAL_FALSE;
                                }
-                       } else {
-                               PQuntrace(obj->intern->conn);
-                               RETVAL_TRUE;
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Connection not initialized");
-                       RETVAL_FALSE;
                }
        }
 }
@@ -2922,14 +3152,20 @@ ZEND_END_ARG_INFO();
 static PHP_METHOD(pqtypes, __construct) {
        zend_error_handling zeh;
        zval *zconn, *znsp = NULL;
+       STATUS rv;
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "O|a!", &zconn, php_pqconn_class_entry, &znsp)) {
-               php_pqconn_object_t *conn_obj = zend_object_store_get_object(zconn TSRMLS_CC);
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "O|a!", &zconn, php_pqconn_class_entry, &znsp);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
 
-               if (conn_obj->intern) {
-                       zval *retval = NULL;
+       if (SUCCESS == rv) {
+               php_pqconn_object_t *conn_obj = zend_object_store_get_object(zconn TSRMLS_CC);
+
+               if (!conn_obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Connection not initialized");
+               } else {
                        php_pqtypes_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
+                       zval *retval = NULL;
 
                        obj->intern = ecalloc(1, sizeof(*obj->intern));
                        obj->intern->conn = conn_obj;
@@ -2941,14 +3177,12 @@ static PHP_METHOD(pqtypes, __construct) {
                        } else {
                                zend_call_method_with_0_params(&getThis(), Z_OBJCE_P(getThis()), NULL, "refresh", &retval);
                        }
+
                        if (retval) {
                                zval_ptr_dtor(&retval);
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Connection not initialized");
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
 #define PHP_PQ_TYPES_QUERY \
@@ -2963,14 +3197,24 @@ ZEND_BEGIN_ARG_INFO_EX(ai_pqtypes_refresh, 0, 0, 0)
 ZEND_END_ARG_INFO();
 static PHP_METHOD(pqtypes, refresh) {
        HashTable *nsp = NULL;
+       zend_error_handling zeh;
+       STATUS rv;
 
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|H/!", &nsp)) {
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|H/!", &nsp);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
+
+       if (SUCCESS == rv) {
                php_pqtypes_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Types not initialized");
+               } else {
                        PGresult *res;
 
-                       if (nsp && zend_hash_num_elements(nsp)) {
+                       if (!nsp || !zend_hash_num_elements(nsp)) {
+                               res = PQexec(obj->intern->conn->intern->conn, PHP_PQ_TYPES_QUERY " and nspname in ('public', 'pg_catalog')");
+                       } else {
                                int i, count;
                                Oid *oids;
                                char **params = NULL;
@@ -2998,14 +3242,12 @@ static PHP_METHOD(pqtypes, refresh) {
                                efree(oids);
                                efree(params);
                                zend_hash_destroy(&zdtor);
-                       } else {
-                               res = PQexec(obj->intern->conn->intern->conn, PHP_PQ_TYPES_QUERY " and nspname in ('public', 'pg_catalog')");
                        }
 
-                       php_pqconn_notify_listeners(obj->intern->conn TSRMLS_CC);
-
-                       if (res) {
-                               if (PGRES_TUPLES_OK == PQresultStatus(res)) {
+                       if (!res) {
+                               throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to fetch types (%s)", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
+                       } else {
+                               if (SUCCESS == php_pqres_success(res TSRMLS_CC)) {
                                        int r, rows;
 
                                        for (r = 0, rows = PQntuples(res); r < rows; ++r) {
@@ -3018,16 +3260,11 @@ static PHP_METHOD(pqtypes, refresh) {
                                                zend_hash_index_update(&obj->intern->types, oid, (void *) &row, sizeof(zval *), NULL);
                                                zend_hash_add(&obj->intern->types, name, strlen(name) + 1, (void *) &row, sizeof(zval *), NULL);
                                        }
-                               } else {
-                                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "Could not fetch types (%s)", PHP_PQresultErrorMessage(res));
                                }
+
                                PHP_PQclear(res);
-                       } else {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Could not fetch types (%s)", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
+                               php_pqconn_notify_listeners(obj->intern->conn TSRMLS_CC);
                        }
-
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Types not initialized");
                }
        }
 }
@@ -3131,24 +3368,24 @@ static PHP_METHOD(pqres, bind) {
        if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z/z", &zcol, &zref)) {
                php_pqres_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Result not initialized");
+               } else {
                        php_pqres_col_t col;
 
-                       if (SUCCESS == column_nn(obj, zcol, &col TSRMLS_CC)) {
+                       if (SUCCESS != column_nn(obj, zcol, &col TSRMLS_CC)) {
+                               RETVAL_FALSE;
+                       } else {
                                Z_ADDREF_P(zref);
-                               if (SUCCESS == zend_hash_index_update(&obj->intern->bound, col.num, (void *) &zref, sizeof(zval *), NULL)) {
-                                       zend_hash_sort(&obj->intern->bound, zend_qsort, compare_index, 0 TSRMLS_CC);
-                                       RETVAL_TRUE;
-                               } else {
+
+                               if (SUCCESS != zend_hash_index_update(&obj->intern->bound, col.num, (void *) &zref, sizeof(zval *), NULL)) {
                                        php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to bind column %s@%d", col.name, col.num);
                                        RETVAL_FALSE;
+                               } else {
+                                       zend_hash_sort(&obj->intern->bound, zend_qsort, compare_index, 0 TSRMLS_CC);
+                                       RETVAL_TRUE;
                                }
-                       } else {
-                               RETVAL_FALSE;
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Result not initialized");
-                       RETVAL_FALSE;
                }
        }
 }
@@ -3157,18 +3394,21 @@ static int apply_bound(void *p TSRMLS_DC, int argc, va_list argv, zend_hash_key
 {
        zval **zvalue, **zbound = p;
        zval **zrow = va_arg(argv, zval **);
+       STATUS *rv = va_arg(argv, STATUS *);
 
-       if (SUCCESS == zend_hash_index_find(Z_ARRVAL_PP(zrow), key->h, (void *) &zvalue)) {
+       if (SUCCESS != zend_hash_index_find(Z_ARRVAL_PP(zrow), key->h, (void *) &zvalue)) {
+               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to find column ad index %lu", key->h);
+               *rv = FAILURE;
+               return ZEND_HASH_APPLY_STOP;
+       } else {
                zval_dtor(*zbound);
                ZVAL_COPY_VALUE(*zbound, *zvalue);
                ZVAL_NULL(*zvalue);
                zval_ptr_dtor(zvalue);
                Z_ADDREF_P(*zbound);
                *zvalue = *zbound;
+               *rv = SUCCESS;
                return ZEND_HASH_APPLY_KEEP;
-       } else {
-               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to find column ad index %lu", key->h);
-               return ZEND_HASH_APPLY_STOP;
        }
 }
 
@@ -3176,23 +3416,33 @@ ZEND_BEGIN_ARG_INFO_EX(ai_pqres_fetch_bound, 0, 0, 0)
 ZEND_END_ARG_INFO();
 static PHP_METHOD(pqres, fetchBound) {
        zend_error_handling zeh;
+       STATUS rv;
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters_none()) {
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters_none();
+       zend_restore_error_handling(&zeh TSRMLS_CC);
+
+       if (SUCCESS == rv) {
                php_pqres_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Result not initialized");
+               } else {
                        zval **row = NULL;
 
-                       if (SUCCESS == php_pqres_iteration(getThis(), obj, PHP_PQRES_FETCH_ARRAY, &row TSRMLS_CC)) {
-                               if (row) {
-                                       zend_hash_apply_with_arguments(&obj->intern->bound TSRMLS_CC, apply_bound, 1, row);
+                       if (SUCCESS == php_pqres_iteration(getThis(), obj, PHP_PQRES_FETCH_ARRAY, &row TSRMLS_CC) && row) {
+                               zend_replace_error_handling(EH_THROW, exce(EX_RUNTIME), &zeh TSRMLS_CC);
+                               zend_hash_apply_with_arguments(&obj->intern->bound TSRMLS_CC, apply_bound, 2, row, &rv);
+                               zend_restore_error_handling(&zeh TSRMLS_CC);
+
+                               if (SUCCESS != rv) {
+                                       zval_ptr_dtor(row);
+                               } else {
                                        RETVAL_ZVAL(*row, 1, 0);
                                }
                        }
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
 ZEND_BEGIN_ARG_INFO_EX(ai_pqres_fetch_row, 0, 0, 0)
@@ -3202,25 +3452,31 @@ static PHP_METHOD(pqres, fetchRow) {
        zend_error_handling zeh;
        php_pqres_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
        long fetch_type = -1;
+       STATUS rv;
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|l", &fetch_type)) {
-               if (obj->intern) {
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|l", &fetch_type);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
+
+       if (SUCCESS == rv) {
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Result not initialized");
+               } else {
                        zval **row = NULL;
 
                        if (fetch_type == -1) {
                                 fetch_type = obj->intern->iter ? obj->intern->iter->fetch_type : PHP_PQRES_FETCH_ARRAY;
                        }
+
+                       zend_replace_error_handling(EH_THROW, exce(EX_RUNTIME), &zeh TSRMLS_CC);
                        php_pqres_iteration(getThis(), obj, fetch_type, &row TSRMLS_CC);
+                       zend_restore_error_handling(&zeh TSRMLS_CC);
 
                        if (row) {
                                RETVAL_ZVAL(*row, 1, 0);
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Result not initialized");
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
 static zval **column_at(zval *row, int col TSRMLS_DC)
@@ -3229,14 +3485,14 @@ static zval **column_at(zval *row, int col TSRMLS_DC)
        HashTable *ht = HASH_OF(row);
        int count = zend_hash_num_elements(ht);
 
-       if (col < count) {
+       if (col >= count) {
+               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Column index %d exceeds column count %d", col, count);
+       } else {
                zend_hash_internal_pointer_reset(ht);
                while (col-- > 0) {
                        zend_hash_move_forward(ht);
                }
                zend_hash_get_current_data(ht, (void *) &data);
-       } else {
-               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Column index %d exceeds column count %d", col, count);
        }
        return data;
 }
@@ -3247,16 +3503,22 @@ ZEND_END_ARG_INFO();
 static PHP_METHOD(pqres, fetchCol) {
        zend_error_handling zeh;
        long fetch_col = 0;
+       STATUS rv;
+
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|l", &fetch_col);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|l", &fetch_col)) {
+       if (SUCCESS == rv) {
                php_pqres_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Result not initialized");
+               } else {
                        zval **row = NULL;
 
+                       zend_replace_error_handling(EH_THROW, exce(EX_RUNTIME), &zeh TSRMLS_CC);
                        php_pqres_iteration(getThis(), obj, obj->intern->iter ? obj->intern->iter->fetch_type : 0, &row TSRMLS_CC);
-
                        if (row) {
                                zval **col = column_at(*row, fetch_col TSRMLS_CC);
 
@@ -3264,11 +3526,9 @@ static PHP_METHOD(pqres, fetchCol) {
                                        RETVAL_ZVAL(*col, 1, 0);
                                }
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Result not initialized");
+                       zend_restore_error_handling(&zeh TSRMLS_CC);
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
 static int apply_to_col(void *p TSRMLS_DC, int argc, va_list argv, zend_hash_key *key)
@@ -3279,15 +3539,15 @@ static int apply_to_col(void *p TSRMLS_DC, int argc, va_list argv, zend_hash_key
        STATUS *rv = va_arg(argv, STATUS *);
 
        col = *cols;
-       if (SUCCESS == column_nn(obj, *c, col TSRMLS_CC)) {
-               *rv = SUCCESS;
-       } else {
+
+       if (SUCCESS != column_nn(obj, *c, col TSRMLS_CC)) {
                *rv = FAILURE;
                return ZEND_HASH_APPLY_STOP;
+       } else {
+               *rv = SUCCESS;
+               ++*cols;
+               return ZEND_HASH_APPLY_KEEP;
        }
-       ++*cols;
-
-       return ZEND_HASH_APPLY_KEEP;
 }
 
 static php_pqres_col_t *php_pqres_convert_to_cols(php_pqres_object_t *obj, HashTable *ht TSRMLS_DC)
@@ -3315,13 +3575,18 @@ static PHP_METHOD(pqres, map) {
        zend_error_handling zeh;
        zval *zkeys = 0, *zvals = 0;
        long fetch_type = -1;
+       STATUS rv;
 
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|z/!z/!l", &zkeys, &zvals, &fetch_type);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|z/!z/!l", &zkeys, &zvals, &fetch_type)) {
+       if (SUCCESS == rv) {
                php_pqres_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Result not initialized");
+               } else {
                        int ks = 0, vs = 0;
                        php_pqres_col_t def = {PQfname(obj->intern->res, 0), 0}, *keys = NULL, *vals = NULL;
 
@@ -3385,7 +3650,7 @@ static PHP_METHOD(pqres, map) {
                                                                break;
                                                        }
                                                        if (SUCCESS != zend_symtable_update(HASH_OF(*cur), key, len + 1, (void *) &tmp, sizeof(zval *), (void *) &cur)) {
-                                                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to create map");
+                                                               throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to create map");
                                                                goto err;
                                                        }
                                                }
@@ -3420,11 +3685,8 @@ static PHP_METHOD(pqres, map) {
                        if (vals) {
                                efree(vals);
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Result not initialized");
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
 ZEND_BEGIN_ARG_INFO_EX(ai_pqres_count, 0, 0, 0)
@@ -3433,10 +3695,10 @@ static PHP_METHOD(pqres, count) {
        if (SUCCESS == zend_parse_parameters_none()) {
                long count;
 
-               if (SUCCESS == php_pqres_count_elements(getThis(), &count TSRMLS_CC)) {
-                       RETVAL_LONG(count);
+               if (SUCCESS != php_pqres_count_elements(getThis(), &count TSRMLS_CC)) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Result not initialized");
                } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Result not initialized");
+                       RETVAL_LONG(count);
                }
        }
 }
@@ -3464,20 +3726,23 @@ static PHP_METHOD(pqstm, __construct) {
        char *name_str, *query_str;
        int name_len, *query_len;
        zend_bool async = 0;
+       STATUS rv;
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "Oss|a/!b", &zconn, php_pqconn_class_entry, &name_str, &name_len, &query_str, &query_len, &ztypes, &async)) {
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "Oss|a/!b", &zconn, php_pqconn_class_entry, &name_str, &name_len, &query_str, &query_len, &ztypes, &async);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
+
+       if (SUCCESS == rv) {
                php_pqstm_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
                php_pqconn_object_t *conn_obj = zend_object_store_get_object(zconn TSRMLS_CC);
 
-               if (conn_obj->intern) {
-                       STATUS rv;
+               if (!conn_obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Connection not initialized");
+               } else {
                        if (async) {
-                               conn_obj->intern->poller = PQconsumeInput;
                                rv = php_pqconn_prepare_async(zconn, conn_obj, name_str, query_str, ztypes ? Z_ARRVAL_P(ztypes) : NULL TSRMLS_CC);
                        } else {
                                rv = php_pqconn_prepare(zconn, conn_obj, name_str, query_str, ztypes ? Z_ARRVAL_P(ztypes) : NULL TSRMLS_CC);
-                               php_pqconn_notify_listeners(conn_obj TSRMLS_CC);
                        }
 
                        if (SUCCESS == rv) {
@@ -3489,11 +3754,8 @@ static PHP_METHOD(pqstm, __construct) {
                                ZEND_INIT_SYMTABLE(&stm->bound);
                                obj->intern = stm;
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Connection not initialized");
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 ZEND_BEGIN_ARG_INFO_EX(ai_pqstm_bind, 0, 0, 2)
        ZEND_ARG_INFO(0, param_no)
@@ -3506,12 +3768,12 @@ static PHP_METHOD(pqstm, bind) {
        if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "lz", &param_no, &param_ref)) {
                php_pqstm_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Statement not initialized");
+               } else {
                        Z_ADDREF_P(param_ref);
                        zend_hash_index_update(&obj->intern->bound, param_no, (void *) &param_ref, sizeof(zval *), NULL);
                        zend_hash_sort(&obj->intern->bound, zend_qsort, compare_index, 0 TSRMLS_CC);
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Statement not initialized");
                }
        }
 }
@@ -3522,55 +3784,46 @@ ZEND_END_ARG_INFO();
 static PHP_METHOD(pqstm, exec) {
        zend_error_handling zeh;
        zval *zparams = NULL;
+       STATUS rv;
+
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|a/!", &zparams);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|a/!", &zparams)) {
+       if (SUCCESS == rv) {
                php_pqstm_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
-                       if (obj->intern->conn->intern) {
-                               int count = 0;
-                               char **params = NULL;
-                               HashTable zdtor;
-                               PGresult *res;
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Statement not initialized");
+               } else {
+                       int count = 0;
+                       char **params = NULL;
+                       HashTable zdtor;
+                       PGresult *res;
 
-                               ZEND_INIT_SYMTABLE(&zdtor);
+                       ZEND_INIT_SYMTABLE(&zdtor);
 
-                               if (zparams) {
-                                       count = php_pq_params_to_array(Z_ARRVAL_P(zparams), &params, &zdtor TSRMLS_CC);
-                               } else {
-                                       count = php_pq_params_to_array(&obj->intern->bound, &params, &zdtor TSRMLS_CC);
-                               }
+                       if (zparams) {
+                               count = php_pq_params_to_array(Z_ARRVAL_P(zparams), &params, &zdtor TSRMLS_CC);
+                       } else {
+                               count = php_pq_params_to_array(&obj->intern->bound, &params, &zdtor TSRMLS_CC);
+                       }
 
-                               res = PQexecPrepared(obj->intern->conn->intern->conn, obj->intern->name, count, (const char *const*) params, NULL, NULL, 0);
+                       res = PQexecPrepared(obj->intern->conn->intern->conn, obj->intern->name, count, (const char *const*) params, NULL, NULL, 0);
 
-                               if (params) {
-                                       efree(params);
-                               }
-                               zend_hash_destroy(&zdtor);
+                       if (params) {
+                               efree(params);
+                       }
+                       zend_hash_destroy(&zdtor);
 
+                       if (!res) {
+                               throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to execute statement (%s)", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
+                       } else if (SUCCESS == php_pqres_success(res TSRMLS_CC)) {
+                               php_pq_object_to_zval_no_addref(PQresultInstanceData(res, php_pqconn_event), &return_value TSRMLS_CC);
                                php_pqconn_notify_listeners(obj->intern->conn TSRMLS_CC);
-
-                               if (res) {
-                                       if (SUCCESS == php_pqres_success(res TSRMLS_CC)) {
-                                               php_pqres_t *r = ecalloc(1, sizeof(*r));
-
-                                               r->res = res;
-                                               ZEND_INIT_SYMTABLE(&r->bound);
-                                               return_value->type = IS_OBJECT;
-                                               return_value->value.obj = php_pqres_create_object_ex(php_pqres_class_entry, r, NULL TSRMLS_CC);
-                                       }
-                               } else {
-                                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "Could not execute statement (%s)", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
-                               }
-                       } else {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Connection not initialized");
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Statement not initialized");
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
 ZEND_BEGIN_ARG_INFO_EX(ai_pqstm_exec_async, 0, 0, 0)
@@ -3581,131 +3834,112 @@ static PHP_METHOD(pqstm, execAsync) {
        zend_error_handling zeh;
        zval *zparams = NULL;
        php_pq_callback_t resolver = {{0}};
+       STATUS rv;
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|a/!f", &zparams, &resolver.fci, &resolver.fcc)) {
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|a/!f", &zparams, &resolver.fci, &resolver.fcc);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
+
+       if (SUCCESS == rv) {
                php_pqstm_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
-                       if (obj->intern->conn->intern) {
-                               int count;
-                               char **params = NULL;
-                               HashTable zdtor;
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Statement not initialized");
+               } else {
+                       int count;
+                       char **params = NULL;
+                       HashTable zdtor;
 
-                               if (zparams) {
-                                       ZEND_INIT_SYMTABLE(&zdtor);
-                                       count = php_pq_params_to_array(Z_ARRVAL_P(zparams), &params, &zdtor TSRMLS_CC);
-                               }
+                       if (zparams) {
+                               ZEND_INIT_SYMTABLE(&zdtor);
+                               count = php_pq_params_to_array(Z_ARRVAL_P(zparams), &params, &zdtor TSRMLS_CC);
+                       }
 
+                       if (!PQsendQueryPrepared(obj->intern->conn->intern->conn, obj->intern->name, count, (const char *const*) params, NULL, NULL, 0)) {
+                               throw_exce(EX_IO TSRMLS_CC, "Failed to execute statement (%s)", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
+                       } else if (obj->intern->conn->intern->unbuffered && !PQsetSingleRowMode(obj->intern->conn->intern->conn)) {
+                               throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to enable unbuffered mode (%s)", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
+                       } else {
                                php_pq_callback_dtor(&obj->intern->conn->intern->onevent);
                                if (resolver.fci.size > 0) {
                                        obj->intern->conn->intern->onevent = resolver;
                                        php_pq_callback_addref(&obj->intern->conn->intern->onevent);
                                }
-
                                obj->intern->conn->intern->poller = PQconsumeInput;
+                       }
 
-                               if (PQsendQueryPrepared(obj->intern->conn->intern->conn, obj->intern->name, count, (const char *const*) params, NULL, NULL, 0)) {
-                                       if (obj->intern->conn->intern->unbuffered) {
-                                               if (!PQsetSingleRowMode(obj->intern->conn->intern->conn)) {
-                                                       php_error_docref(NULL TSRMLS_CC, E_NOTICE, "Could not enable unbuffered mode (%s)", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
-                                               }
-                                       }
-                                       RETVAL_TRUE;
-                               } else {
-                                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "Could not execute statement (%s)", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
-                                       RETVAL_FALSE;
-                               }
-
-                               if (params) {
-                                       efree(params);
-                               }
-                               if (zparams) {
-                                       zend_hash_destroy(&zdtor);
-                               }
-
-                               php_pqconn_notify_listeners(obj->intern->conn TSRMLS_CC);
-
-                       } else {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Connection not initialized");
-                               RETVAL_FALSE;
+                       if (params) {
+                               efree(params);
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Statement not initialized");
-                       RETVAL_FALSE;
+                       if (zparams) {
+                               zend_hash_destroy(&zdtor);
+                       }
+
+                       php_pqconn_notify_listeners(obj->intern->conn TSRMLS_CC);
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
 ZEND_BEGIN_ARG_INFO_EX(ai_pqstm_desc, 0, 0, 0)
 ZEND_END_ARG_INFO();
 static PHP_METHOD(pqstm, desc) {
        zend_error_handling zeh;
+       STATUS rv;
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters_none()) {
-               php_pqstm_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters_none();
+       zend_restore_error_handling(&zeh TSRMLS_CC);
 
-               if (obj->intern) {
-                       if (obj->intern->conn->intern) {
-                               PGresult *res = PQdescribePrepared(obj->intern->conn->intern->conn, obj->intern->name);
+       if (SUCCESS == rv) {
+               php_pqstm_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-                               php_pqconn_notify_listeners(obj->intern->conn TSRMLS_CC);
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Statement not initialized");
+               } else {
+                       PGresult *res = PQdescribePrepared(obj->intern->conn->intern->conn, obj->intern->name);
 
-                               if (res) {
-                                       if (SUCCESS == php_pqres_success(res TSRMLS_CC)) {
-                                               int p, params;
+                       if (!res) {
+                               throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to describe statement (%s)", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
+                       } else {
+                               if (SUCCESS == php_pqres_success(res TSRMLS_CC)) {
+                                       int p, params;
 
-                                               array_init(return_value);
-                                               for (p = 0, params = PQnparams(res); p < params; ++p) {
-                                                       add_next_index_long(return_value, PQparamtype(res, p));
-                                               }
+                                       array_init(return_value);
+                                       for (p = 0, params = PQnparams(res); p < params; ++p) {
+                                               add_next_index_long(return_value, PQparamtype(res, p));
                                        }
-                               } else {
-                                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "Could not describe statement (%s)", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
                                }
-                       } else {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Connection not initialized");
+                               PHP_PQclear(res);
+                               php_pqconn_notify_listeners(obj->intern->conn TSRMLS_CC);
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Statement not initialized");
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
 ZEND_BEGIN_ARG_INFO_EX(ai_pqstm_desc_async, 0, 0, 0)
 ZEND_END_ARG_INFO();
 static PHP_METHOD(pqstm, descAsync) {
        zend_error_handling zeh;
+       STATUS rv;
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters_none()) {
-               php_pqstm_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters_none();
+       zend_restore_error_handling(&zeh TSRMLS_CC);
 
-               if (obj->intern) {
+       if (SUCCESS == rv) {
+               php_pqstm_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Statement not initialized");
+               } else if (!PQsendDescribePrepared(obj->intern->conn->intern->conn, obj->intern->name)) {
+                       throw_exce(EX_IO TSRMLS_CC, "Failed to describe statement: %s", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
+               } else {
                        obj->intern->conn->intern->poller = PQconsumeInput;
-
-                       if (PQsendDescribePrepared(obj->intern->conn->intern->conn, obj->intern->name)) {
-                               RETVAL_TRUE;
-                       } else {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Could not describe statement: %s", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
-                               RETVAL_FALSE;
-                       }
-
                        php_pqconn_notify_listeners(obj->intern->conn TSRMLS_CC);
-
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "Statement not initialized");
-                       RETVAL_FALSE;
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
-
 static zend_function_entry php_pqstm_methods[] = {
        PHP_ME(pqstm, __construct, ai_pqstm_construct, ZEND_ACC_PUBLIC|ZEND_ACC_CTOR)
        PHP_ME(pqstm, bind, ai_pqstm_bind, ZEND_ACC_PUBLIC)
@@ -3728,14 +3962,18 @@ static PHP_METHOD(pqtxn, __construct) {
        zval *zconn;
        long isolation = PHP_PQTXN_READ_COMMITTED;
        zend_bool async = 0, readonly = 0, deferrable = 0;
+       STATUS rv;
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "O|blbb", &zconn, php_pqconn_class_entry, &async, &isolation, &readonly, &deferrable)) {
-               STATUS rv;
-               php_pqtxn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "O|blbb", &zconn, php_pqconn_class_entry, &async, &isolation, &readonly, &deferrable);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
+
+       if (SUCCESS == rv) {
                php_pqconn_object_t *conn_obj = zend_object_store_get_object(zconn TSRMLS_CC);
 
-               if (conn_obj->intern) {
+               if (!conn_obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Connection not initialized");
+               } else {
                        if (async) {
                                rv = php_pqconn_start_transaction_async(zconn, conn_obj, isolation, readonly, deferrable TSRMLS_CC);
                        } else {
@@ -3743,277 +3981,342 @@ static PHP_METHOD(pqtxn, __construct) {
                        }
 
                        if (SUCCESS == rv) {
+                               php_pqtxn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
+
                                obj->intern = ecalloc(1, sizeof(*obj->intern));
 
                                php_pq_object_addref(conn_obj TSRMLS_CC);
                                obj->intern->conn = conn_obj;
+                               obj->intern->open = 1;
                                obj->intern->isolation = isolation;
                                obj->intern->readonly = readonly;
                                obj->intern->deferrable = deferrable;
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Connection not initialized");
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
 ZEND_BEGIN_ARG_INFO_EX(ai_pqtxn_savepoint, 0, 0, 0)
 ZEND_END_ARG_INFO();
 static PHP_METHOD(pqtxn, savepoint) {
        zend_error_handling zeh;
+       STATUS rv;
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters_none()) {
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters_none();
+       zend_restore_error_handling(&zeh TSRMLS_CC);
+
+       if (SUCCESS == rv) {
                php_pqtxn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
-                       char *cmd;
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Transaction not initialized");
+               } else if (!obj->intern->open) {
+                       throw_exce(EX_RUNTIME TSRMLS_CC, "pq\\Transaction already closed");
+               } else {
                        PGresult *res;
+                       smart_str cmd = {0};
 
-                       spprintf(&cmd, 0, "SAVEPOINT \"%u\"", ++obj->intern->savepoint);
-                       res = PQexec(obj->intern->conn->intern->conn, cmd);
+                       smart_str_appends(&cmd, "SAVEPOINT \"");
+                       smart_str_append_unsigned(&cmd, ++obj->intern->savepoint);
+                       smart_str_appends(&cmd, "\"");
+                       smart_str_0(&cmd);
 
-                       if (res) {
+                       res = PQexec(obj->intern->conn->intern->conn, cmd.c);
+
+                       if (!res) {
+                               throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to create %s (%s)", cmd.c, PHP_PQerrorMessage(obj->intern->conn->intern->conn));
+                       } else {
                                php_pqres_success(res TSRMLS_CC);
                                PHP_PQclear(res);
-                       } else {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to create %s (%s)", cmd, PHP_PQerrorMessage(obj->intern->conn->intern->conn));
                        }
 
-                       efree(cmd);
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Transaction not initialized");
+                       smart_str_free(&cmd);
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
 ZEND_BEGIN_ARG_INFO_EX(ai_pqtxn_savepoint_async, 0, 0, 0)
 ZEND_END_ARG_INFO();
 static PHP_METHOD(pqtxn, savepointAsync) {
        zend_error_handling zeh;
+       STATUS rv;
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters_none()) {
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters_none();
+       zend_restore_error_handling(&zeh TSRMLS_CC);
+
+       if (SUCCESS == rv) {
                php_pqtxn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
-                       char *cmd;
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Transaction not initialized");
+               } else if (!obj->intern->open) {
+                       throw_exce(EX_RUNTIME TSRMLS_CC, "pq\\Transaction already closed");
+               } else {
+                       smart_str cmd = {0};
 
-                       spprintf(&cmd, 0, "SAVEPOINT \"%u\"", ++obj->intern->savepoint);
-                       if (!PQsendQuery(obj->intern->conn->intern->conn, cmd)) {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to create %s (%s)", cmd, PHP_PQerrorMessage(obj->intern->conn->intern->conn));
+                       smart_str_appends(&cmd, "SAVEPOINT \"");
+                       smart_str_append_unsigned(&cmd, ++obj->intern->savepoint);
+                       smart_str_appends(&cmd, "\"");
+                       smart_str_0(&cmd);
+
+                       if (!PQsendQuery(obj->intern->conn->intern->conn, cmd.c)) {
+                               throw_exce(EX_IO TSRMLS_CC, "Failed to create %s (%s)", cmd.c, PHP_PQerrorMessage(obj->intern->conn->intern->conn));
                        }
 
-                       efree(cmd);
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Transaction not initialized");
+                       smart_str_free(&cmd);
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
 ZEND_BEGIN_ARG_INFO_EX(ai_pqtxn_commit, 0, 0, 0)
 ZEND_END_ARG_INFO();
 static PHP_METHOD(pqtxn, commit) {
        zend_error_handling zeh;
+       STATUS rv;
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters_none()) {
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters_none();
+       zend_restore_error_handling(&zeh TSRMLS_CC);
+
+       if (SUCCESS == rv) {
                php_pqtxn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Transacation not initialized");
+               } else if (!obj->intern->open) {
+                       throw_exce(EX_RUNTIME TSRMLS_CC, "pq\\Transacation already closed");
+               } else {
                        PGresult *res;
+                       smart_str cmd = {0};
 
-                       if (obj->intern->savepoint) {
-                               char *cmd;
-
-                               spprintf(&cmd, 0, "RELEASE SAVEPOINT \"%u\"", obj->intern->savepoint--);
-                               res = PQexec(obj->intern->conn->intern->conn, cmd);
+                       if (!obj->intern->savepoint) {
+                               res = PQexec(obj->intern->conn->intern->conn, "COMMIT");
+                       } else {
+                               smart_str_appends(&cmd, "RELEASE SAVEPOINT \"");
+                               smart_str_append_unsigned(&cmd, obj->intern->savepoint--);
+                               smart_str_appends(&cmd, "\"");
+                               smart_str_0(&cmd);
 
-                               if (res) {
-                                       php_pqres_success(res TSRMLS_CC);
-                                       PHP_PQclear(res);
-                               } else {
-                                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to %s (%s)", cmd, PHP_PQerrorMessage(obj->intern->conn->intern->conn));
-                               }
+                               res = PQexec(obj->intern->conn->intern->conn, cmd.c);
+                       }
 
-                               efree(cmd);
+                       if (!res) {
+                               throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to %s (%s)", cmd.c ? cmd.c : "commit transaction", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
                        } else {
-                               res = PQexec(obj->intern->conn->intern->conn, "COMMIT");
-
-                               if (res) {
-                                       php_pqres_success(res TSRMLS_CC);
-                                       PHP_PQclear(res);
-                               } else {
-                                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to commit transaction (%s)", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
+                               if (SUCCESS == php_pqres_success(res TSRMLS_CC)) {
+                                       if (!cmd.c) {
+                                               obj->intern->open = 0;
+                                       }
                                }
+                               PHP_PQclear(res);
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Transaction not initialized");
+
+                       smart_str_free(&cmd);
+                       php_pqconn_notify_listeners(obj->intern->conn TSRMLS_CC);
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
 ZEND_BEGIN_ARG_INFO_EX(ai_pqtxn_commit_async, 0, 0, 0)
 ZEND_END_ARG_INFO();
 static PHP_METHOD(pqtxn, commitAsync) {
        zend_error_handling zeh;
+       STATUS rv;
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters_none()) {
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters_none();
+       zend_restore_error_handling(&zeh TSRMLS_CC);
+
+       if (SUCCESS == rv) {
                php_pqtxn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
-                       obj->intern->conn->intern->poller = PQconsumeInput;
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Transaction not initialized");
+               } else if (!obj->intern->open) {
+                       throw_exce(EX_RUNTIME TSRMLS_CC, "pq\\Transaction already closed");
+               } else {
+                       int rc;
+                       smart_str cmd = {0};
 
-                       if (obj->intern->savepoint) {
-                               char *cmd;
+                       if (!obj->intern->savepoint) {
+                               rc = PQsendQuery(obj->intern->conn->intern->conn, "COMMIT");
+                       } else {
+                               smart_str_appends(&cmd, "RELEASE SAVEPOINT \"");
+                               smart_str_append_unsigned(&cmd, obj->intern->savepoint--);
+                               smart_str_appends(&cmd, "\"");
+                               smart_str_0(&cmd);
 
-                               spprintf(&cmd, 0, "RELEASE SAVEPOINT \"%u\"", obj->intern->savepoint--);
-                               if (!PQsendQuery(obj->intern->conn->intern->conn, cmd)) {
-                                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to %s (%s)", cmd, PHP_PQerrorMessage(obj->intern->conn->intern->conn));
-                               }
+                               rc = PQsendQuery(obj->intern->conn->intern->conn, cmd.c);
+                       }
 
-                               efree(cmd);
+                       if (!rc) {
+                               throw_exce(EX_IO TSRMLS_CC, "Failed to %s (%s)", cmd.c ? cmd.c : "commmit transaction", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
                        } else {
-                               if (!PQsendQuery(obj->intern->conn->intern->conn, "COMMIT")) {
-                                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to commit transaction (%s)", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
+                               if (!cmd.c) {
+                                       obj->intern->open = 0;
                                }
+                               obj->intern->conn->intern->poller = PQconsumeInput;
+                               php_pqconn_notify_listeners(obj->intern->conn TSRMLS_CC);
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Transaction not initialized");
+
+                       smart_str_free(&cmd);
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
 ZEND_BEGIN_ARG_INFO_EX(ai_pqtxn_rollback, 0, 0, 0)
 ZEND_END_ARG_INFO();
 static PHP_METHOD(pqtxn, rollback) {
        zend_error_handling zeh;
+       STATUS rv;
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters_none()) {
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters_none();
+       zend_restore_error_handling(&zeh TSRMLS_CC);
+
+       if (SUCCESS == rv) {
                php_pqtxn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Transaction not initialized");
+               } else if (!obj->intern->open) {
+                       throw_exce(EX_RUNTIME TSRMLS_CC, "pq\\Transaction already closed");
+               } else {
                        PGresult *res;
+                       smart_str cmd = {0};
 
-                       if (obj->intern->savepoint) {
-                               char *cmd;
-
-                               spprintf(&cmd, 0, "ROLLBACK TO SAVEPOINT \"%u\"", obj->intern->savepoint--);
-                               res = PQexec(obj->intern->conn->intern->conn, cmd);
+                       if (!obj->intern->savepoint) {
+                               res = PQexec(obj->intern->conn->intern->conn, "ROLLBACK");
+                       } else {
+                               smart_str_appends(&cmd, "ROLLBACK TO SAVEPOINT \"");
+                               smart_str_append_unsigned(&cmd, obj->intern->savepoint--);
+                               smart_str_appends(&cmd, "\"");
+                               smart_str_0(&cmd);
 
-                               if (res) {
-                                       php_pqres_success(res TSRMLS_CC);
-                                       PHP_PQclear(res);
-                               } else {
-                                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to %s (%s)", cmd, PHP_PQerrorMessage(obj->intern->conn->intern->conn));
-                               }
+                               res = PQexec(obj->intern->conn->intern->conn, cmd.c);
+                       }
 
-                               efree(cmd);
+                       if (!res) {
+                               throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to %s (%s)", cmd.c ? cmd.c : "rollback transaction", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
                        } else {
-                               res = PQexec(obj->intern->conn->intern->conn, "ROLLBACK");
-
-                               if (res) {
-                                       php_pqres_success(res TSRMLS_CC);
-                                       PHP_PQclear(res);
-                               } else {
-                                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to rollback transaction (%s)", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
+                               if (SUCCESS == php_pqres_success(res TSRMLS_CC)) {
+                                       if (!cmd.c) {
+                                               obj->intern->open = 0;
+                                       }
                                }
+                               PHP_PQclear(res);
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Transaction not initialized");
+
+                       smart_str_free(&cmd);
+                       php_pqconn_notify_listeners(obj->intern->conn TSRMLS_CC);
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
 ZEND_BEGIN_ARG_INFO_EX(ai_pqtxn_rollback_async, 0, 0, 0)
 ZEND_END_ARG_INFO();
 static PHP_METHOD(pqtxn, rollbackAsync) {
        zend_error_handling zeh;
+       STATUS rv;
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters_none()) {
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters_none();
+       zend_restore_error_handling(&zeh TSRMLS_CC);
+
+       if (SUCCESS == rv) {
                php_pqtxn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
-                       obj->intern->conn->intern->poller = PQconsumeInput;
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Transaction not initialized");
+               } else if (!obj->intern->open) {
+                       throw_exce(EX_RUNTIME TSRMLS_CC, "pq\\Transaction already closed");
+               } else {
+                       int rc;
+                       smart_str cmd = {0};
 
-                       if (obj->intern->savepoint) {
-                               char *cmd;
+                       if (!obj->intern->savepoint) {
+                               rc = PQsendQuery(obj->intern->conn->intern->conn, "ROLLBACK");
+                       } else {
+                               smart_str_appends(&cmd, "ROLLBACK TO SAVEPOINT \"");
+                               smart_str_append_unsigned(&cmd, obj->intern->savepoint--);
+                               smart_str_appends(&cmd, "\"");
+                               smart_str_0(&cmd);
 
-                               spprintf(&cmd, 0, "ROLLBACK TO SAVEPOINT \"%u\"", obj->intern->savepoint--);
-                               if (!PQsendQuery(obj->intern->conn->intern->conn, cmd)) {
-                                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to %s (%s)", cmd, PHP_PQerrorMessage(obj->intern->conn->intern->conn));
-                               }
+                               rc = PQsendQuery(obj->intern->conn->intern->conn, cmd.c);
+                       }
 
-                               efree(cmd);
+                       if (!rc) {
+                               throw_exce(EX_IO TSRMLS_CC, "Failed to %s (%s)", cmd.c ? cmd.c : "rollback transaction", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
                        } else {
-                               if (!PQsendQuery(obj->intern->conn->intern->conn, "ROLLBACK")) {
-                                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "Could not rollback transaction (%s)", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
+                               if (!cmd.c) {
+                                       obj->intern->open = 0;
                                }
+                               obj->intern->conn->intern->poller = PQconsumeInput;
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Transaction not initialized");
+
+                       smart_str_free(&cmd);
+                       php_pqconn_notify_listeners(obj->intern->conn TSRMLS_CC);
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
 ZEND_BEGIN_ARG_INFO_EX(ai_pqtxn_export_snapshot, 0, 0, 0)
 ZEND_END_ARG_INFO();
 static PHP_METHOD(pqtxn, exportSnapshot) {
        zend_error_handling zeh;
+       STATUS rv;
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters_none()) {
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters_none();
+       zend_restore_error_handling(&zeh TSRMLS_CC);
+
+       if (SUCCESS == rv) {
                php_pqtxn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Transaction not initialized");
+               } else {
                        PGresult *res = PQexec(obj->intern->conn->intern->conn, "SELECT pg_export_snapshot()");
 
-                       if (res) {
+                       if (!res) {
+                               throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to export transaction snapshot (%s)", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
+                       } else {
                                if (SUCCESS == php_pqres_success(res TSRMLS_CC)) {
                                        RETVAL_STRING(PQgetvalue(res, 0, 0), 1);
                                }
 
                                PHP_PQclear(res);
-                       } else {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to export transaction snapshot (%s)", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Transaction not initialized");
+
+                       php_pqconn_notify_listeners(obj->intern->conn TSRMLS_CC);
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
 ZEND_BEGIN_ARG_INFO_EX(ai_pqtxn_export_snapshot_async, 0, 0, 0)
 ZEND_END_ARG_INFO();
 static PHP_METHOD(pqtxn, exportSnapshotAsync) {
        zend_error_handling zeh;
+       STATUS rv;
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters_none()) {
-               php_pqtxn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters_none();
+       zend_restore_error_handling(&zeh TSRMLS_CC);
 
-               if (obj->intern) {
-                       obj->intern->conn->intern->poller = PQconsumeInput;
+       if (SUCCESS == rv) {
+               php_pqtxn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-                       if (!PQsendQuery(obj->intern->conn->intern->conn, "SELECT pg_export_snapshot()")) {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to export transaction snapshot (%s)", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
-                       }
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Transaction not initialized");
+               } else if (!PQsendQuery(obj->intern->conn->intern->conn, "SELECT pg_export_snapshot()")) {
+                       throw_exce(EX_IO TSRMLS_CC, "Failed to export transaction snapshot (%s)", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
                } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Transaction not initialized");
+                       obj->intern->conn->intern->poller = PQconsumeInput;
+                       php_pqconn_notify_listeners(obj->intern->conn TSRMLS_CC);
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
 ZEND_BEGIN_ARG_INFO_EX(ai_pqtxn_import_snapshot, 0, 0, 1)
@@ -4023,33 +4326,46 @@ static PHP_METHOD(pqtxn, importSnapshot) {
        zend_error_handling zeh;
        char *snapshot_str;
        int snapshot_len;
+       STATUS rv;
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &snapshot_str, &snapshot_len)) {
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &snapshot_str, &snapshot_len);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
+
+       if (SUCCESS == rv) {
                php_pqtxn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
-                       if (obj->intern->isolation >= PHP_PQTXN_REPEATABLE_READ) {
-                               char *cmd, *sid = PQescapeLiteral(obj->intern->conn->intern->conn, snapshot_str, snapshot_len);
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Transaction not initialized");
+               } else if (obj->intern->isolation < PHP_PQTXN_REPEATABLE_READ) {
+                       throw_exce(EX_RUNTIME TSRMLS_CC, "pq\\Transaction must have at least isolation level REPEATABLE READ to be able to import a snapshot");
+               } else {
+                       char *sid = PQescapeLiteral(obj->intern->conn->intern->conn, snapshot_str, snapshot_len);
+
+                       if (!sid) {
+                               throw_exce(EX_ESCAPE TSRMLS_CC, "Failed to quote snapshot identifier (%s)", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
+                       } else {
                                PGresult *res;
+                               smart_str cmd = {0};
 
-                               spprintf(&cmd, 0, "SET TRANSACTION SNAPSHOT %s", sid);
-                               res = PQexec(obj->intern->conn->intern->conn, cmd);
+                               smart_str_appends(&cmd, "SET TRANSACTION SNAPSHOT ");
+                               smart_str_appends(&cmd, sid);
+                               smart_str_0(&cmd);
 
-                               if (res) {
+                               res = PQexec(obj->intern->conn->intern->conn, cmd.c);
+
+                               if (!res) {
+                                       throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to import transaction snapshot (%s)", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
+                               } else {
                                        php_pqres_success(res TSRMLS_CC);
                                        PHP_PQclear(res);
-                               } else {
-                                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to %s (%s)", cmd, PHP_PQerrorMessage(obj->intern->conn->intern->conn));
                                }
-                       } else {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "A transaction must have at least isolation level REPEATABLE READ to be able to import a snapshot");
+
+                               smart_str_free(&cmd);
+                               php_pqconn_notify_listeners(obj->intern->conn TSRMLS_CC);
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Transaction not initialized");
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
 ZEND_BEGIN_ARG_INFO_EX(ai_pqtxn_import_snapshot_async, 0, 0, 1)
@@ -4059,35 +4375,56 @@ static PHP_METHOD(pqtxn, importSnapshotAsync) {
        zend_error_handling zeh;
        char *snapshot_str;
        int snapshot_len;
+       STATUS rv;
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &snapshot_str, &snapshot_len)) {
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &snapshot_str, &snapshot_len);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
+
+       if (SUCCESS == rv) {
                php_pqtxn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
-                       if (obj->intern->isolation >= PHP_PQTXN_REPEATABLE_READ) {
-                               char *sid = PQescapeLiteral(obj->intern->conn->intern->conn, snapshot_str, snapshot_len);
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Transaction not initialized");
+               } else if (obj->intern->isolation < PHP_PQTXN_REPEATABLE_READ) {
+                       throw_exce(EX_RUNTIME TSRMLS_CC, "pq\\Transaction must have at least isolation level REPEATABLE READ to be able to import a snapshot");
+               } else {
+                       char *sid = PQescapeLiteral(obj->intern->conn->intern->conn, snapshot_str, snapshot_len);
 
-                               if (sid) {
-                                       char *cmd;
-                                       obj->intern->conn->intern->poller = PQconsumeInput;
+                       if (!sid) {
+                               throw_exce(EX_ESCAPE TSRMLS_CC, "Failed to quote snapshot identifier (%s)", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
+                       } else {
+                               smart_str cmd = {0};
 
-                                       spprintf(&cmd, 0, "SET TRANSACTION SNAPSHOT %s", sid);
-                                       if (!PQsendQuery(obj->intern->conn->intern->conn, cmd)) {
-                                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to %s (%s)", cmd, PHP_PQerrorMessage(obj->intern->conn->intern->conn));
-                                       }
-                                       efree(cmd);
+                               smart_str_appends(&cmd, "SET TRANSACTION SNAPSHOT ");
+                               smart_str_appends(&cmd, sid);
+                               smart_str_0(&cmd);
+
+                               if (!PQsendQuery(obj->intern->conn->intern->conn, cmd.c)) {
+                                       throw_exce(EX_IO TSRMLS_CC, "Failed to %s (%s)", cmd.c, PHP_PQerrorMessage(obj->intern->conn->intern->conn));
                                } else {
-                                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to quote snapshot identifier (%s)", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
+                                       obj->intern->conn->intern->poller = PQconsumeInput;
                                }
-                       } else {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "A transaction must have at least isolation level REPEATABLE READ to be able to import a snapshot");
+
+                               smart_str_free(&cmd);
+                               php_pqconn_notify_listeners(obj->intern->conn TSRMLS_CC);
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Transaction not initialized");
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
+}
+
+static const char *strmode(long mode)
+{
+       switch (mode & (INV_READ|INV_WRITE)) {
+       case INV_READ|INV_WRITE:
+               return "rw";
+       case INV_READ:
+               return "r";
+       case INV_WRITE:
+               return "w";
+       default:
+               return "-";
+       }
 }
 
 ZEND_BEGIN_ARG_INFO_EX(ai_pqtxn_open_lob, 0, 0, 1)
@@ -4097,15 +4434,23 @@ ZEND_END_ARG_INFO();
 static PHP_METHOD(pqtxn, openLOB) {
        zend_error_handling zeh;
        long mode = INV_WRITE|INV_READ, loid;
+       STATUS rv;
+
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "l|l", &loid, &mode);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "l|l", &loid, &mode)) {
+       if (SUCCESS == rv) {
                php_pqtxn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Transaction not initialized");
+               } else {
                        int lofd = lo_open(obj->intern->conn->intern->conn, loid, mode);
 
-                       if (lofd >= 0) {
+                       if (lofd < 0) {
+                               throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to open large object with oid=%ld with mode '%s' (%s)", loid, strmode(mode), PHP_PQerrorMessage(obj->intern->conn->intern->conn));
+                       } else {
                                php_pqlob_t *lob = ecalloc(1, sizeof(*lob));
 
                                lob->lofd = lofd;
@@ -4115,19 +4460,11 @@ static PHP_METHOD(pqtxn, openLOB) {
 
                                return_value->type = IS_OBJECT;
                                return_value->value.obj = php_pqlob_create_object_ex(php_pqlob_class_entry, lob, NULL TSRMLS_CC);
-                       } else {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to open large object with mode '%s' (%s)",
-                                               (mode & (INV_READ|INV_WRITE) ? "rw" :
-                                                               (mode & INV_READ ? "r" :
-                                                                               (mode & INV_WRITE ? "w" : "-"))),
-                                               PHP_PQerrorMessage(obj->intern->conn->intern->conn)
-                               );
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Transaction not initialized");
+
+                       php_pqconn_notify_listeners(obj->intern->conn TSRMLS_CC);
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
 ZEND_BEGIN_ARG_INFO_EX(ai_pqtxn_create_lob, 0, 0, 0)
@@ -4136,19 +4473,30 @@ ZEND_END_ARG_INFO();
 static PHP_METHOD(pqtxn, createLOB) {
        zend_error_handling zeh;
        long mode = INV_WRITE|INV_READ;
+       STATUS rv;
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|l", &mode)) {
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|l", &mode);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
+
+       if (SUCCESS == rv) {
                php_pqtxn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Transaction not initialized");
+               } else {
                        Oid loid = lo_creat(obj->intern->conn->intern->conn, mode);
 
-                       if (loid != InvalidOid) {
+                       if (loid == InvalidOid) {
+                               throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to create large object with mode '%s' (%s)", strmode(mode), PHP_PQerrorMessage(obj->intern->conn->intern->conn));
+                       } else {
                                int lofd = lo_open(obj->intern->conn->intern->conn, loid, mode);
 
-                               if (lofd >= 0) {
+                               if (lofd < 0) {
+                                       throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to open large object with oid=%ld with mode '%s': %s", loid, strmode(mode), PHP_PQerrorMessage(obj->intern->conn->intern->conn));
+                               } else {
                                        php_pqlob_t *lob = ecalloc(1, sizeof(*lob));
+
                                        lob->lofd = lofd;
                                        lob->loid = loid;
                                        php_pq_object_addref(obj TSRMLS_CC);
@@ -4156,48 +4504,39 @@ static PHP_METHOD(pqtxn, createLOB) {
 
                                        return_value->type = IS_OBJECT;
                                        return_value->value.obj = php_pqlob_create_object_ex(php_pqlob_class_entry, lob, NULL TSRMLS_CC);
-                               } else {
-                                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to open large object with mode '%s': %s",
-                                                       (mode & (INV_READ|INV_WRITE) ? "rw" :
-                                                                       (mode & INV_READ ? "r" :
-                                                                                       (mode & INV_WRITE ? "w" : "-"))),
-                                                       PHP_PQerrorMessage(obj->intern->conn->intern->conn)
-                                       );
                                }
-                       } else {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to create large object with mode '%s': %s",
-                                               (mode & (INV_READ|INV_WRITE) ? "rw" :
-                                                               (mode & INV_READ ? "r" :
-                                                                               (mode & INV_WRITE ? "w" : "-"))),
-                                               PHP_PQerrorMessage(obj->intern->conn->intern->conn)
-                               );
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Transaction not initialized");
+
+                       php_pqconn_notify_listeners(obj->intern->conn TSRMLS_CC);
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
 ZEND_BEGIN_ARG_INFO_EX(ai_pqtxn_unlink_lob, 0, 0, 1)
        ZEND_ARG_INFO(0, oid)
 ZEND_END_ARG_INFO();
 static PHP_METHOD(pqtxn, unlinkLOB) {
+       zend_error_handling zeh;
        long loid;
+       STATUS rv;
+
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "l", &loid);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
 
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "l", &loid)) {
+       if (SUCCESS == rv) {
                php_pqtxn_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
-                       if (1 == lo_unlink(obj->intern->conn->intern->conn, loid)) {
-                               RETVAL_TRUE;
-                       } else {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to unlink LOB (oid=%ld): %s", loid, PHP_PQerrorMessage(obj->intern->conn->intern->conn));
-                               RETVAL_FALSE;
-                       }
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Transaction not initialized");
                } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Transaction not initialized");
-                       RETVAL_FALSE;
+                       int rc = lo_unlink(obj->intern->conn->intern->conn, loid);
+
+                       if (rc != 1) {
+                               throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to unlink LOB (oid=%ld): %s", loid, PHP_PQerrorMessage(obj->intern->conn->intern->conn));
+                       }
+
+                       php_pqconn_notify_listeners(obj->intern->conn TSRMLS_CC);
                }
        }
 }
@@ -4226,51 +4565,57 @@ ZEND_END_ARG_INFO();
 static PHP_METHOD(pqcancel, __construct) {
        zend_error_handling zeh;
        zval *zconn;
+       STATUS rv;
+
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "O", &zconn, php_pqconn_class_entry);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "O", &zconn, php_pqconn_class_entry)) {
+       if (SUCCESS == rv) {
                php_pqconn_object_t *conn_obj = zend_object_store_get_object(zconn TSRMLS_CC);
 
-               if (conn_obj->intern) {
+               if (!conn_obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Connection not initialized");
+               } else {
                        PGcancel *cancel = PQgetCancel(conn_obj->intern->conn);
 
-                       if (cancel) {
+                       if (!cancel) {
+                               throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to acquire cancel (%s)", PHP_PQerrorMessage(conn_obj->intern->conn));
+                       } else {
                                php_pqcancel_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
                                obj->intern = ecalloc(1, sizeof(*obj->intern));
                                obj->intern->cancel = cancel;
                                php_pq_object_addref(conn_obj TSRMLS_CC);
                                obj->intern->conn = conn_obj;
-                       } else {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Could not acquire cancel (%s)", PHP_PQerrorMessage(conn_obj->intern->conn));
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Connection not initialized");
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
 ZEND_BEGIN_ARG_INFO_EX(ai_pqcancel_cancel, 0, 0, 0)
 ZEND_END_ARG_INFO();
 static PHP_METHOD(pqcancel, cancel) {
        zend_error_handling zeh;
+       STATUS rv;
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters_none()) {
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters_none();
+       zend_restore_error_handling(&zeh TSRMLS_CC);
+
+       if (SUCCESS == rv) {
                php_pqcancel_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
-                       char err[256];
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Cancel not initialized");
+               } else {
+                       char err[256] = {0};
 
                        if (!PQcancel(obj->intern->cancel, err, sizeof(err))) {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Could not request cancellation: %s", err);
+                               throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to request cancellation (%s)", err);
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Cancel not initialized");
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
 static zend_function_entry php_pqcancel_methods[] = {
@@ -4279,24 +4624,6 @@ static zend_function_entry php_pqcancel_methods[] = {
        {0}
 };
 
-static void php_pqconn_add_eventhandler(zval *zconn, php_pqconn_object_t *conn_obj, const char *type_str, size_t type_len, zval *zevent TSRMLS_DC)
-{
-       zval **evhs;
-
-       if (SUCCESS == zend_hash_find(&conn_obj->intern->eventhandlers, type_str, type_len + 1, (void *) &evhs)) {
-               Z_ADDREF_P(zevent);
-               add_next_index_zval(*evhs, zevent);
-       } else {
-               zval *evh;
-
-               MAKE_STD_ZVAL(evh);
-               array_init(evh);
-               Z_ADDREF_P(zevent);
-               add_next_index_zval(evh, zevent);
-               zend_hash_add(&conn_obj->intern->eventhandlers, type_str, type_len + 1, (void *) &evh, sizeof(zval *), NULL);
-       }
-}
-
 ZEND_BEGIN_ARG_INFO_EX(ai_pqevent_construct, 0, 0, 3)
        ZEND_ARG_OBJ_INFO(0, connection, pq\\Connection, 0)
        ZEND_ARG_INFO(0, type)
@@ -4308,52 +4635,58 @@ static PHP_METHOD(pqevent, __construct) {
        char *type_str;
        int type_len;
        php_pq_callback_t cb;
+       STATUS rv;
+
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "Osf", &zconn, php_pqconn_class_entry, &type_str, &type_len, &cb.fci, &cb.fcc);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "Osf", &zconn, php_pqconn_class_entry, &type_str, &type_len, &cb.fci, &cb.fcc)) {
+       if (SUCCESS == rv) {
                php_pqconn_object_t *conn_obj = zend_object_store_get_object(zconn TSRMLS_CC);
 
-               if (conn_obj->intern) {
+               if (!conn_obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Connection not initialized");
+               } else {
                        php_pqevent_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
                        obj->intern = ecalloc(1, sizeof(*obj->intern));
                        php_pq_callback_addref(&cb);
                        obj->intern->cb = cb;
-                       php_pq_object_addref(conn_obj TSRMLS_CC);
-                       obj->intern->conn = conn_obj;
                        obj->intern->type = estrdup(type_str);
-
-                       php_pqconn_add_eventhandler(zconn, conn_obj, type_str, type_len, getThis() TSRMLS_CC);
-
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Connection not initialized");
+                       obj->intern->h = php_pqconn_add_eventhandler(conn_obj, type_str, type_len, getThis() TSRMLS_CC);
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
 ZEND_BEGIN_ARG_INFO_EX(ai_pqevent_trigger, 0, 0, 1)
        ZEND_ARG_ARRAY_INFO(0, args, 1)
 ZEND_END_ARG_INFO();
 static PHP_METHOD(pqevent, trigger) {
+       zend_error_handling zeh;
        zval *args;
+       STATUS rv;
+
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "a/", &args);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
 
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "a/", &args)) {
+       if (SUCCESS == rv) {
                php_pqevent_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Event not initialized");
+               } else {
                        zval *rv = NULL;
 
-                       if (SUCCESS == zend_fcall_info_call(&obj->intern->cb.fci, &obj->intern->cb.fcc, &rv, args TSRMLS_CC)) {
+                       if (SUCCESS != zend_fcall_info_call(&obj->intern->cb.fci, &obj->intern->cb.fcc, &rv, args TSRMLS_CC)) {
+                               throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to trigger event");
+                       } else {
                                if (rv) {
                                        RETVAL_ZVAL(rv, 0, 1);
                                } else {
                                        RETVAL_TRUE;
                                }
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Event not initialized");
-                       RETVAL_FALSE;
                }
        }
 }
@@ -4373,21 +4706,32 @@ static PHP_METHOD(pqlob, __construct) {
        zend_error_handling zeh;
        zval *ztxn;
        long mode = INV_WRITE|INV_READ, loid = InvalidOid;
+       STATUS rv;
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "O|ll", &ztxn, php_pqtxn_class_entry, &loid, &mode)) {
-               php_pqtxn_object_t *txn_obj = zend_object_store_get_object(ztxn TSRMLS_CC);
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "O|ll", &ztxn, php_pqtxn_class_entry, &loid, &mode);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
 
-               if (txn_obj->intern) {
+       if (SUCCESS == rv) {
+               php_pqtxn_object_t *txn_obj = zend_object_store_get_object(ztxn TSRMLS_CC);
 
+               if (!txn_obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Transaction not initialized");
+               } else if (!txn_obj->intern->open) {
+                       throw_exce(EX_RUNTIME TSRMLS_CC, "pq\\Transation already closed");
+               } else {
                        if (loid == InvalidOid) {
                                loid = lo_creat(txn_obj->intern->conn->intern->conn, mode);
                        }
 
-                       if (loid != InvalidOid) {
+                       if (loid == InvalidOid) {
+                               throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to create large object with mode '%s' (%s)", strmode(mode), PHP_PQerrorMessage(txn_obj->intern->conn->intern->conn));
+                       } else {
                                int lofd = lo_open(txn_obj->intern->conn->intern->conn, loid, mode);
 
-                               if (lofd >= 0) {
+                               if (lofd < 0) {
+                                       throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to open large object with oid=%ld with mode '%s' (%s)", loid, strmode(mode), PHP_PQerrorMessage(txn_obj->intern->conn->intern->conn));
+                               } else {
                                        php_pqlob_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
                                        obj->intern = ecalloc(1, sizeof(*obj->intern));
@@ -4395,52 +4739,42 @@ static PHP_METHOD(pqlob, __construct) {
                                        obj->intern->loid = loid;
                                        php_pq_object_addref(txn_obj TSRMLS_CC);
                                        obj->intern->txn = txn_obj;
-                               } else {
-                                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to open large object with mode '%s' (%s)",
-                                                       (mode & (INV_READ|INV_WRITE) ? "rw" :
-                                                                       (mode & INV_READ ? "r" :
-                                                                                       (mode & INV_WRITE ? "w" : "-"))),
-                                                       PHP_PQerrorMessage(txn_obj->intern->conn->intern->conn)
-                                       );
                                }
-                       } else {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to create large object with mode '%s' (%s)",
-                                               (mode & (INV_READ|INV_WRITE) ? "rw" :
-                                                               (mode & INV_READ ? "r" :
-                                                                               (mode & INV_WRITE ? "w" : "-"))),
-                                               PHP_PQerrorMessage(txn_obj->intern->conn->intern->conn)
-                               );
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Transaction not initialized");
+
+                       php_pqconn_notify_listeners(txn_obj->intern->conn TSRMLS_CC);
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
 ZEND_BEGIN_ARG_INFO_EX(ai_pqlob_write, 0, 0, 1)
        ZEND_ARG_INFO(0, data)
 ZEND_END_ARG_INFO();
 static PHP_METHOD(pqlob, write) {
+       zend_error_handling zeh;
        char *data_str;
        int data_len;
+       STATUS rv;
+
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &data_str, &data_len);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
 
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &data_str, &data_len)) {
+       if (SUCCESS == rv) {
                php_pqlob_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\LOB not initialized");
+               } else {
                        int written = lo_write(obj->intern->txn->intern->conn->intern->conn, obj->intern->lofd, data_str, data_len);
 
-                       if (written >= 0) {
-                               RETVAL_LONG(written);
+                       if (written < 0) {
+                               throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to write to LOB with oid=%ld (%s)", obj->intern->loid, PHP_PQerrorMessage(obj->intern->txn->intern->conn->intern->conn));
                        } else {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to write to LOB, oid=%d (%s)", obj->intern->loid,
-                                               PHP_PQerrorMessage(obj->intern->txn->intern->conn->intern->conn));
-                               RETVAL_FALSE;
+                               RETVAL_LONG(written);
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\LOB not initialized");
-                       RETVAL_FALSE;
+
+                       php_pqconn_notify_listeners(obj->intern->txn->intern->conn TSRMLS_CC);
                }
        }
 }
@@ -4450,33 +4784,37 @@ ZEND_BEGIN_ARG_INFO_EX(ai_pqlob_read, 0, 0, 0)
        ZEND_ARG_INFO(1, read)
 ZEND_END_ARG_INFO();
 static PHP_METHOD(pqlob, read) {
+       zend_error_handling zeh;
        long length = 0x1000;
        zval *zread = NULL;
+       STATUS rv;
+
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|lz!", &length, &zread);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
 
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|lz!", &length, &zread)) {
+       if (SUCCESS == rv) {
                php_pqlob_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\LOB not initialized");
+               } else {
                        char *buffer = emalloc(length + 1);
                        int read = lo_read(obj->intern->txn->intern->conn->intern->conn, obj->intern->lofd, buffer, length);
 
-                       if (read >= 0) {
+                       if (read < 0) {
+                               efree(buffer);
+                               throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to read from LOB with oid=%d (%s)", obj->intern->loid, PHP_PQerrorMessage(obj->intern->txn->intern->conn->intern->conn));
+                       } else {
                                if (zread) {
                                        zval_dtor(zread);
                                        ZVAL_LONG(zread, read);
                                }
                                buffer[read] = '\0';
                                RETVAL_STRINGL(buffer, read, 0);
-                       } else {
-                               efree(buffer);
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to read from LOB, oid=%d (%s)", obj->intern->loid,
-                                               PHP_PQerrorMessage(obj->intern->txn->intern->conn->intern->conn));
-                               RETVAL_FALSE;
                        }
 
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\LOB not initialized");
-                       RETVAL_FALSE;
+                       php_pqconn_notify_listeners(obj->intern->txn->intern->conn TSRMLS_CC);
                }
        }
 }
@@ -4486,24 +4824,29 @@ ZEND_BEGIN_ARG_INFO_EX(ai_pqlob_seek, 0, 0, 1)
        ZEND_ARG_INFO(0, whence)
 ZEND_END_ARG_INFO();
 static PHP_METHOD(pqlob, seek) {
+       zend_error_handling zeh;
        long offset, whence = SEEK_SET;
+       STATUS rv;
+
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "l|l", &offset, &whence);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
 
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "l|l", &offset, &whence)) {
+       if (SUCCESS == rv) {
                php_pqlob_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\LOB not initialized");
+               } else {
                        int position = lo_lseek(obj->intern->txn->intern->conn->intern->conn, obj->intern->lofd, offset, whence);
 
-                       if (position >= 0) {
-                               RETVAL_LONG(position);
+                       if (position < 0) {
+                               throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to seek offset in LOB with oid=%d (%s)", obj->intern->loid,    PHP_PQerrorMessage(obj->intern->txn->intern->conn->intern->conn));
                        } else {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to seek offset in LOB, oid=%d (%s)", obj->intern->loid,
-                                               PHP_PQerrorMessage(obj->intern->txn->intern->conn->intern->conn));
-                               RETVAL_FALSE;
+                               RETVAL_LONG(position);
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\LOB not initialized");
-                       RETVAL_FALSE;
+
+                       php_pqconn_notify_listeners(obj->intern->txn->intern->conn TSRMLS_CC);
                }
        }
 }
@@ -4511,22 +4854,28 @@ static PHP_METHOD(pqlob, seek) {
 ZEND_BEGIN_ARG_INFO_EX(ai_pqlob_tell, 0, 0, 0)
 ZEND_END_ARG_INFO();
 static PHP_METHOD(pqlob, tell) {
-       if (SUCCESS == zend_parse_parameters_none()) {
+       zend_error_handling zeh;
+       STATUS rv;
+
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters_none();
+       zend_restore_error_handling(&zeh TSRMLS_CC);
+
+       if (SUCCESS == rv) {
                php_pqlob_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\LOB not initialized");
+               } else {
                        int position = lo_tell(obj->intern->txn->intern->conn->intern->conn, obj->intern->lofd);
 
-                       if (position >= 0) {
-                               RETVAL_LONG(position);
+                       if (position < 0) {
+                               throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to tell offset in LOB with oid=%d (%s)", obj->intern->loid, PHP_PQerrorMessage(obj->intern->txn->intern->conn->intern->conn));
                        } else {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to tell offset in LOB (oid=%d): %s", obj->intern->loid,
-                                               PHP_PQerrorMessage(obj->intern->txn->intern->conn->intern->conn));
-                               RETVAL_FALSE;
+                               RETVAL_LONG(position);
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\LOB not initialized");
-                       RETVAL_FALSE;
+
+                       php_pqconn_notify_listeners(obj->intern->txn->intern->conn TSRMLS_CC);
                }
        }
 }
@@ -4535,22 +4884,27 @@ ZEND_BEGIN_ARG_INFO_EX(ai_pqlob_truncate, 0, 0, 0)
        ZEND_ARG_INFO(0, length)
 ZEND_END_ARG_INFO();
 static PHP_METHOD(pqlob, truncate) {
+       zend_error_handling zeh;
        long length = 0;
+       STATUS rv;
+
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|l", &length);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
 
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|l", &length)) {
+       if (SUCCESS == rv) {
                php_pqlob_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
-                       if (0 == lo_truncate(obj->intern->txn->intern->conn->intern->conn, obj->intern->lofd, length)) {
-                               RETVAL_TRUE;
-                       } else {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to truncate LOB (oid=%d): %s", obj->intern->loid,
-                                               PHP_PQerrorMessage(obj->intern->txn->intern->conn->intern->conn));
-                               RETVAL_FALSE;
-                       }
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\LOB not initialized");
                } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\LOB not initialized");
-                       RETVAL_FALSE;
+                       int rc = lo_truncate(obj->intern->txn->intern->conn->intern->conn, obj->intern->lofd, length);
+
+                       if (rc != 0) {
+                               throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to truncate LOB with oid=%d (%s)", obj->intern->loid, PHP_PQerrorMessage(obj->intern->txn->intern->conn->intern->conn));
+                       }
+
+                       php_pqconn_notify_listeners(obj->intern->txn->intern->conn TSRMLS_CC);
                }
        }
 }
@@ -4577,35 +4931,45 @@ static PHP_METHOD(pqcopy, __construct) {
        char *expr_str, *opt_str = "";
        int expr_len, opt_len = 0;
        long direction;
+       STATUS rv;
+
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "Osl|s", &zconn, php_pqconn_class_entry, &expr_str, &expr_len, &direction, &opt_str, &opt_len);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "Osl|s", &zconn, php_pqconn_class_entry, &expr_str, &expr_len, &direction, &opt_str, &opt_len)) {
+       if (SUCCESS == rv) {
                php_pqconn_object_t *conn_obj = zend_object_store_get_object(zconn TSRMLS_CC);
 
-               if (conn_obj->intern) {
-                       char *copy = NULL;
+               if (!conn_obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\Connection not initialized");
+               } else {
+                       php_pqcopy_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
+                       smart_str cmd = {0};
+                       PGresult *res;
+
+                       smart_str_appends(&cmd, "COPY ");
+                       smart_str_appendl(&cmd, expr_str, expr_len);
 
                        switch (direction) {
                        case PHP_PQCOPY_FROM_STDIN:
-                               spprintf(&copy, 0, "COPY %s %s %s", expr_str, "FROM STDIN", opt_str);
+                               smart_str_appends(&cmd, " FROM STDIN ");
                                break;
-
                        case PHP_PQCOPY_TO_STDOUT:
-                               spprintf(&copy, 0, "COPY %s %s %s", expr_str, "TO STDOUT", opt_str);
+                               smart_str_appends(&cmd, " TO STDOUT ");
                                break;
-
                        default:
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Invalid COPY direction, expected one of FROM_STDIN (%d) TO_STDOUT (%d), got %ld",
-                                               PHP_PQCOPY_FROM_STDIN, PHP_PQCOPY_TO_STDOUT, direction);
-                               break;
+                               throw_exce(EX_RUNTIME TSRMLS_CC, "Invalid COPY direction, expected one of FROM_STDIN (%d) TO_STDOUT (%d), got %ld", PHP_PQCOPY_FROM_STDIN, PHP_PQCOPY_TO_STDOUT, direction);
+                               smart_str_free(&cmd);
+                               return;
                        }
+                       smart_str_appendl(&cmd, opt_str, opt_len);
+                       smart_str_0(&cmd);
 
-                       if (copy) {
-                               php_pqcopy_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
-                               PGresult *res = PQexec(conn_obj->intern->conn, copy);
-
-                               efree(copy);
+                       res = PQexec(conn_obj->intern->conn, cmd.c);
 
+                       if (!res) {
+                               throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to start %s (%s)", cmd.c, PHP_PQerrorMessage(obj->intern->conn->intern->conn));
+                       } else {
                                if (SUCCESS == php_pqres_success(res TSRMLS_CC)) {
                                        obj->intern = ecalloc(1, sizeof(*obj->intern));
                                        obj->intern->direction = direction;
@@ -4617,11 +4981,11 @@ static PHP_METHOD(pqcopy, __construct) {
 
                                PHP_PQclear(res);
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\Connection not initialized");
+
+                       smart_str_free(&cmd);
+                       php_pqconn_notify_listeners(obj->intern->conn TSRMLS_CC);
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
 ZEND_BEGIN_ARG_INFO_EX(ai_pqcopy_put, 0, 0, 1)
@@ -4631,26 +4995,26 @@ static PHP_METHOD(pqcopy, put) {
        zend_error_handling zeh;
        char *data_str;
        int data_len;
+       STATUS rv;
+
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &data_str, &data_len);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &data_str, &data_len)) {
+       if (SUCCESS == rv) {
                php_pqcopy_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-               if (obj->intern) {
-                       if (PHP_PQCOPY_FROM_STDIN == obj->intern->direction) {
-                               if (1 == PQputCopyData(obj->intern->conn->intern->conn, data_str, data_len)) {
-                                       RETVAL_TRUE;
-                               } else {
-                                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to send COPY data (%s)", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
-                               }
-                       } else {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\COPY was not initialized with FROM_STDIN");
-                       }
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\COPY not initialized");
+               } else if (obj->intern->direction != PHP_PQCOPY_FROM_STDIN) {
+                       throw_exce(EX_RUNTIME TSRMLS_CC, "pq\\COPY was not initialized with FROM_STDIN");
                } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\COPY not initialized");
+                       if (1 != PQputCopyData(obj->intern->conn->intern->conn, data_str, data_len)) {
+                               throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to put COPY data (%s)", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
+                       }
+                       php_pqconn_notify_listeners(obj->intern->conn TSRMLS_CC);
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
 ZEND_BEGIN_ARG_INFO_EX(ai_pqcopy_end, 0, 0, 0)
@@ -4660,36 +5024,36 @@ static PHP_METHOD(pqcopy, end) {
        zend_error_handling zeh;
        char *error_str = NULL;
        int error_len = 0;
+       STATUS rv;
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|s!", &error_str, &error_len)) {
-               php_pqcopy_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|s!", &error_str, &error_len);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
 
-               if (obj->intern) {
-                       if (PHP_PQCOPY_FROM_STDIN == obj->intern->direction) {
-                               if (1 == PQputCopyEnd(obj->intern->conn->intern->conn, error_str)) {
-                                       PGresult *res = PQgetResult(obj->intern->conn->intern->conn);
+       if (SUCCESS == rv) {
+               php_pqcopy_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-                                       if (res) {
-                                               if (SUCCESS == php_pqres_success(res TSRMLS_CC)) {
-                                                       RETVAL_TRUE;
-                                               }
+               if (!obj->intern) {
+                       throw_exce(EX_RUNTIME TSRMLS_CC, "pq\\COPY not intitialized");
+               } else if (obj->intern->direction != PHP_PQCOPY_FROM_STDIN) {
+                       throw_exce(EX_RUNTIME TSRMLS_CC, "pq\\COPY was not intitialized with FROM_STDIN");
+               } else {
+                       if (1 != PQputCopyEnd(obj->intern->conn->intern->conn, error_str)) {
+                               throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to end COPY (%s)", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
+                       } else {
+                               PGresult *res = PQgetResult(obj->intern->conn->intern->conn);
 
-                                               PHP_PQclear(res);
-                                       } else {
-                                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to get COPY result (%s)", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
-                                       }
+                               if (!res) {
+                                       throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to fetch COPY result (%s)", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
                                } else {
-                                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to end COPY (%s)", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
+                                       php_pqres_success(res TSRMLS_CC);
+                                       PHP_PQclear(res);
                                }
-                       } else {
-                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\COPY was not initialized with FROM_STDIN");
                        }
-               } else {
-                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "pq\\COPY not initialized");
+
+                       php_pqconn_notify_listeners(obj->intern->conn TSRMLS_CC);
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
 ZEND_BEGIN_ARG_INFO_EX(ai_pqcopy_get, 0, 0, 1)
@@ -4698,54 +5062,57 @@ ZEND_END_ARG_INFO();
 static PHP_METHOD(pqcopy, get) {
        zend_error_handling zeh;
        zval *zdata;
+       STATUS rv;
 
-       zend_replace_error_handling(EH_THROW, NULL, &zeh TSRMLS_CC);
-       if (SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z", &zdata)) {
-               php_pqcopy_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
-               char *buffer = NULL;
-
-               if (obj->intern) {
-                       if (PHP_PQCOPY_TO_STDOUT == obj->intern->direction) {
-                               PGresult *res;
-                               int bytes = PQgetCopyData(obj->intern->conn->intern->conn, &buffer, 0);
+       zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh TSRMLS_CC);
+       rv = zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z", &zdata);
+       zend_restore_error_handling(&zeh TSRMLS_CC);
 
-                               switch (bytes) {
-                               case -1:
-                                       res = PQgetResult(obj->intern->conn->intern->conn);
+       if (SUCCESS == rv) {
+               php_pqcopy_object_t *obj = zend_object_store_get_object(getThis() TSRMLS_CC);
 
-                                       if (res) {
-                                               if (SUCCESS == php_pqres_success(res TSRMLS_CC)) {
-                                                       RETVAL_FALSE;
-                                               }
+               if (!obj->intern) {
+                       throw_exce(EX_UNINITIALIZED TSRMLS_CC, "pq\\COPY not initialized");
+               } else if (obj->intern->direction != PHP_PQCOPY_TO_STDOUT) {
+                       throw_exce(EX_RUNTIME TSRMLS_CC, "pq\\COPY was not intialized with TO_STDOUT");
+               } else {
+                       PGresult *res;
+                       char *buffer = NULL;
+                       int bytes = PQgetCopyData(obj->intern->conn->intern->conn, &buffer, 0);
 
-                                               PHP_PQclear(res);
-                                       } else {
-                                               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to get COPY result (%s)", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
-                                       }
-                                       break;
+                       switch (bytes) {
+                       case -2:
+                               throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to fetch COPY data (%s)", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
+                               break;
 
-                               case -2:
-                                       php_error_docref(NULL TSRMLS_CC, E_WARNING, "Failed to get COPY data (%s)", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
-                                       break;
+                       case -1:
+                               res = PQgetResult(obj->intern->conn->intern->conn);
 
-                               default:
-                                       zval_dtor(zdata);
-                                       if (buffer) {
-                                               ZVAL_STRINGL(zdata, buffer, bytes, 1);
-                                       } else {
-                                               ZVAL_EMPTY_STRING(zdata);
-                                       }
-                                       RETVAL_TRUE;
-                                       break;
+                               if (!res) {
+                                       throw_exce(EX_RUNTIME TSRMLS_CC, "Failed to fetch COPY result (%s)", PHP_PQerrorMessage(obj->intern->conn->intern->conn));
+                               } else {
+                                       php_pqres_success(res TSRMLS_CC);
+                                       PHP_PQclear(res);
+                                       RETVAL_FALSE;
                                }
+                               break;
 
+                       default:
+                               zval_dtor(zdata);
                                if (buffer) {
-                                       PQfreemem(buffer);
+                                       ZVAL_STRINGL(zdata, buffer, bytes, 1);
+                               } else {
+                                       ZVAL_EMPTY_STRING(zdata);
                                }
+                               RETVAL_TRUE;
+                               break;
+                       }
+
+                       if (buffer) {
+                               PQfreemem(buffer);
                        }
                }
        }
-       zend_restore_error_handling(&zeh TSRMLS_CC);
 }
 
 static zend_function_entry php_pqcopy_methods[] = {
@@ -4756,6 +5123,10 @@ static zend_function_entry php_pqcopy_methods[] = {
        {0}
 };
 
+static zend_function_entry php_pqexc_methods[] = {
+       {0}
+};
+
 /* {{{ PHP_MINIT_FUNCTION
  */
 static PHP_MINIT_FUNCTION(pq)
@@ -4763,6 +5134,41 @@ static PHP_MINIT_FUNCTION(pq)
        zend_class_entry ce = {0};
        php_pq_object_prophandler_t ph = {0};
 
+       INIT_NS_CLASS_ENTRY(ce, "pq", "Exception", php_pqexc_methods);
+       php_pqexc_interface_class_entry = zend_register_internal_interface(&ce TSRMLS_CC);
+
+       zend_declare_class_constant_long(php_pqexc_interface_class_entry, ZEND_STRL("INVALID_ARGUMENT"), EX_INVALID_ARGUMENT TSRMLS_CC);
+       zend_declare_class_constant_long(php_pqexc_interface_class_entry, ZEND_STRL("RUNTIME"), EX_RUNTIME TSRMLS_CC);
+       zend_declare_class_constant_long(php_pqexc_interface_class_entry, ZEND_STRL("CONNECTION_FAILED"), EX_CONNECTION_FAILED TSRMLS_CC);
+       zend_declare_class_constant_long(php_pqexc_interface_class_entry, ZEND_STRL("IO"), EX_IO TSRMLS_CC);
+       zend_declare_class_constant_long(php_pqexc_interface_class_entry, ZEND_STRL("ESCAPE"), EX_ESCAPE TSRMLS_CC);
+       zend_declare_class_constant_long(php_pqexc_interface_class_entry, ZEND_STRL("BAD_METHODCALL"), EX_BAD_METHODCALL TSRMLS_CC);
+       zend_declare_class_constant_long(php_pqexc_interface_class_entry, ZEND_STRL("UNINITIALIZED"), EX_UNINITIALIZED TSRMLS_CC);
+       zend_declare_class_constant_long(php_pqexc_interface_class_entry, ZEND_STRL("DOMAIN"), EX_DOMAIN TSRMLS_CC);
+       zend_declare_class_constant_long(php_pqexc_interface_class_entry, ZEND_STRL("SQL"), EX_SQL TSRMLS_CC);
+
+       memset(&ce, 0, sizeof(ce));
+       INIT_NS_CLASS_ENTRY(ce, "pq\\Exception", "InvalidArgumentException", php_pqexc_methods);
+       php_pqexc_invalid_argument_class_entry = zend_register_internal_class_ex(&ce, spl_ce_InvalidArgumentException, "InvalidArgumentException" TSRMLS_CC);
+       zend_class_implements(php_pqexc_invalid_argument_class_entry TSRMLS_CC, 1, php_pqexc_interface_class_entry);
+
+       memset(&ce, 0, sizeof(ce));
+       INIT_NS_CLASS_ENTRY(ce, "pq\\Exception", "RuntimeException", php_pqexc_methods);
+       php_pqexc_runtime_class_entry = zend_register_internal_class_ex(&ce, spl_ce_RuntimeException, "RuntimeException" TSRMLS_CC);
+       zend_class_implements(php_pqexc_runtime_class_entry TSRMLS_CC, 1, php_pqexc_interface_class_entry);
+
+       memset(&ce, 0, sizeof(ce));
+       INIT_NS_CLASS_ENTRY(ce, "pq\\Exception", "BadMethodCallException", php_pqexc_methods);
+       php_pqexc_bad_methodcall_class_entry = zend_register_internal_class_ex(&ce, spl_ce_BadMethodCallException, "BadMethodCallException" TSRMLS_CC);
+       zend_class_implements(php_pqexc_bad_methodcall_class_entry TSRMLS_CC, 1, php_pqexc_interface_class_entry);
+
+       memset(&ce, 0, sizeof(ce));
+       INIT_NS_CLASS_ENTRY(ce, "pq\\Exception", "DomainException", php_pqexc_methods);
+       php_pqexc_domain_class_entry = zend_register_internal_class_ex(&ce, spl_ce_DomainException, "DomainException" TSRMLS_CC);
+       zend_class_implements(php_pqexc_domain_class_entry TSRMLS_CC, 1, php_pqexc_interface_class_entry);
+       zend_declare_property_null(php_pqexc_domain_class_entry, ZEND_STRL("sqlstate"), ZEND_ACC_PUBLIC TSRMLS_CC);
+
+       memset(&ce, 0, sizeof(ce));
        INIT_NS_CLASS_ENTRY(ce, "pq", "Connection", php_pqconn_methods);
        php_pqconn_class_entry = zend_register_internal_class_ex(&ce, NULL, NULL TSRMLS_CC);
        php_pqconn_class_entry->create_object = php_pqconn_create_object;
@@ -4774,7 +5180,7 @@ static PHP_MINIT_FUNCTION(pq)
        php_pqconn_object_handlers.get_property_ptr_ptr = NULL;
        php_pqconn_object_handlers.get_debug_info = php_pq_object_debug_info;
 
-       zend_hash_init(&php_pqconn_object_prophandlers, 13, NULL, NULL, 1);
+       zend_hash_init(&php_pqconn_object_prophandlers, 14, NULL, NULL, 1);
 
        zend_declare_property_long(php_pqconn_class_entry, ZEND_STRL("status"), CONNECTION_BAD, ZEND_ACC_PUBLIC TSRMLS_CC);
        ph.read = php_pqconn_object_read_status;
@@ -4832,6 +5238,10 @@ static PHP_MINIT_FUNCTION(pq)
        ph.read = php_pqconn_object_read_options;
        zend_hash_add(&php_pqconn_object_prophandlers, "options", sizeof("options"), (void *) &ph, sizeof(ph), NULL);
 
+       zend_declare_property_null(php_pqconn_class_entry, ZEND_STRL("eventHandlers"), ZEND_ACC_PUBLIC TSRMLS_CC);
+       ph.read = php_pqconn_object_read_event_handlers;
+       zend_hash_add(&php_pqconn_object_prophandlers, "eventHandlers", sizeof("eventHandlers"), (void *) &ph, sizeof(ph), NULL);
+
        zend_declare_class_constant_long(php_pqconn_class_entry, ZEND_STRL("OK"), CONNECTION_OK TSRMLS_CC);
        zend_declare_class_constant_long(php_pqconn_class_entry, ZEND_STRL("BAD"), CONNECTION_BAD TSRMLS_CC);
        zend_declare_class_constant_long(php_pqconn_class_entry, ZEND_STRL("STARTED"), CONNECTION_STARTED TSRMLS_CC);
@@ -4898,6 +5308,10 @@ static PHP_MINIT_FUNCTION(pq)
        ph.read = php_pqres_object_read_status;
        zend_hash_add(&php_pqres_object_prophandlers, "status", sizeof("status"), (void *) &ph, sizeof(ph), NULL);
 
+       zend_declare_property_null(php_pqres_class_entry, ZEND_STRL("statusMessage"), ZEND_ACC_PUBLIC TSRMLS_CC);
+       ph.read = php_pqres_object_read_status_message;
+       zend_hash_add(&php_pqres_object_prophandlers, "statusMessage", sizeof("statusMessage"), (void *) &ph, sizeof(ph), NULL);
+
        zend_declare_property_null(php_pqres_class_entry, ZEND_STRL("errorMessage"), ZEND_ACC_PUBLIC TSRMLS_CC);
        ph.read = php_pqres_object_read_error_message;
        zend_hash_add(&php_pqres_object_prophandlers, "errorMessage", sizeof("errorMessage"), (void *) &ph, sizeof(ph), NULL);
@@ -4980,19 +5394,19 @@ static PHP_MINIT_FUNCTION(pq)
        ph.write = php_pqtxn_object_write_isolation;
        zend_hash_add(&php_pqtxn_object_prophandlers, "isolation", sizeof("isolation"), (void *) &ph, sizeof(ph), NULL);
 
-       zend_declare_property_null(php_pqtxn_class_entry, ZEND_STRL("readonly"), ZEND_ACC_PUBLIC TSRMLS_CC);
+       zend_declare_property_bool(php_pqtxn_class_entry, ZEND_STRL("readonly"), 0, ZEND_ACC_PUBLIC TSRMLS_CC);
        ph.read = php_pqtxn_object_read_readonly;
        ph.write = php_pqtxn_object_write_readonly;
        zend_hash_add(&php_pqtxn_object_prophandlers, "readonly", sizeof("readonly"), (void *) &ph, sizeof(ph), NULL);
 
-       zend_declare_property_null(php_pqtxn_class_entry, ZEND_STRL("deferrable"), ZEND_ACC_PUBLIC TSRMLS_CC);
+       zend_declare_property_bool(php_pqtxn_class_entry, ZEND_STRL("deferrable"), 0, ZEND_ACC_PUBLIC TSRMLS_CC);
        ph.read = php_pqtxn_object_read_deferrable;
        ph.write = php_pqtxn_object_write_deferrable;
        zend_hash_add(&php_pqtxn_object_prophandlers, "deferrable", sizeof("deferrable"), (void *) &ph, sizeof(ph), NULL);
        ph.write = NULL;
 
        zend_declare_class_constant_long(php_pqtxn_class_entry, ZEND_STRL("READ_COMMITTED"), PHP_PQTXN_READ_COMMITTED TSRMLS_CC);
-       zend_declare_class_constant_long(php_pqtxn_class_entry, ZEND_STRL("REPEATABLE READ"), PHP_PQTXN_REPEATABLE_READ TSRMLS_CC);
+       zend_declare_class_constant_long(php_pqtxn_class_entry, ZEND_STRL("REPEATABLE_READ"), PHP_PQTXN_REPEATABLE_READ TSRMLS_CC);
        zend_declare_class_constant_long(php_pqtxn_class_entry, ZEND_STRL("SERIALIZABLE"), PHP_PQTXN_SERIALIZABLE TSRMLS_CC);
 
        memset(&ce, 0, sizeof(ce));
@@ -5025,11 +5439,7 @@ static PHP_MINIT_FUNCTION(pq)
        php_pqevent_object_handlers.get_property_ptr_ptr = NULL;
        php_pqevent_object_handlers.get_debug_info = php_pq_object_debug_info;
 
-       zend_hash_init(&php_pqevent_object_prophandlers, 2, NULL, NULL, 1);
-
-       zend_declare_property_null(php_pqevent_class_entry, ZEND_STRL("connection"), ZEND_ACC_PUBLIC TSRMLS_CC);
-       ph.read = php_pqevent_object_read_connection;
-       zend_hash_add(&php_pqevent_object_prophandlers, "connection", sizeof("connection"), (void *) &ph, sizeof(ph), NULL);
+       zend_hash_init(&php_pqevent_object_prophandlers, 1, NULL, NULL, 1);
 
        zend_declare_property_null(php_pqevent_class_entry, ZEND_STRL("type"), ZEND_ACC_PUBLIC TSRMLS_CC);
        ph.read = php_pqevent_object_read_type;