DB specific functions to move

[Danack]

Description

Postgres

pgsqlCopyFromArray
pgsqlCopyFromFile
pgsqlCopyToArray
pgsqlCopyToFile
pgsqlGetNotify
pgsqlGetPid
pgsqlLOBCreate
pgsqlLOBOpen
pgsqlLOBUnlink

SQLIte

PDO::sqliteCreateAggregate — Registers an aggregating User Defined Function for use in SQL statements
PDO::sqliteCreateCollation — Registers a User Defined Function for use as a collating function in SQL statements
PDO::sqliteCreateFunction — Registers a User Defined Function for use in SQL statements

[Danack]

SQLite functions are done.

[Danack]

pgsql functions are done, but they still need to be tested.