database >> Database.
Postgresql connection
 pq_connect
 pq_close
 pq_update_types
 pq_conninfo
Postgresql command execution
 pq_exec_params
Postgresql large objects
 pq_lo_import
 pq_lo_export
 pq_lo_unlink
 pq_lo_view
Option setting
 setdbopts
 getdbopts
