pg_lo_create() creates a Large
Object and returns the oid of the
large object. connection
specifies a valid database connection opened by
pg_connect() or
pg_pconnect(). PostgreSQL access
modes INV_READ, INV_WRITE, and INV_ARCHIVE are not supported,
the object is created always with both read and write access.
INV_ARCHIVE has been removed from PostgreSQL itself (version
6.3 and above). It returns large object oid, otherwise it
returns FALSE if an error
occurred.
To use the large object (lo) interface, it is necessary
to enclose it within a transaction block.
注: This function used to be called pg_locreate().