Connection character set.
* public bool $unbuffered = FALSE
Whether to fetch [asynchronous](pq/Connection/: Asynchronous Usage) results in unbuffered mode, i.e. each row generates a distinct pq\Result.
+* public bool $nonblocking = FALSE
+ Whether to set the underlying socket nonblocking, useful for asynchronous handling of writes. See also pq\Connection::flush().
### Connection Information:
* public (readonly) string $db
Default transaction readonlyness for futire pq\Transaction instances.
* public bool $defaultTransactionDeferrable = FALSE
Default transaction deferrability for future pq\Transaction instances.
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