* parse arrays out of PQgetvalue
* listenAsync & notifyAsync
* COPY
* transaction savepoints
* transaction snapshots

* pq\Event\Result\Destroy, 
* pq\Event\Connection\Destroy

* bound columns/variables
* fetchInto/fetchCtor?
* unlisten?
* pq\Result->__clone through PQcopyResult?
* LOB stream wrapper
* LOB convenience import/export over php streams

* check PQresult listeners for PGresults immediately cleared after PQexec...