pg_flush Flush outbound query data on the connection &reftitle.description; mixedpg_flush resourceconnection pg_flush flushes any outbound query data waiting to be sent on the connection. &reftitle.parameters; connection PostgreSQL database connection resource. &reftitle.returnvalues; Returns &true; if the flush was successful or no data was waiting to be flushed, 0 if part of the pending data was flushed but more remains&return.falseforfailure;.