resource pg_lo_open ( resource connection, int oid, string mode )
pg_lo_open() opens a Large Object and
returns large object resource. The resource encapsulates
information about the connection.
oid specifies a valid large object oid and
mode can be either "r", "w", or "rw". It
returns FALSE if there is an error.
Warning
Do not close the database connection before closing the large
object resource.
To use the large object (lo) interface, it is necessary to
enclose it within a transaction block.
Note:
This function used to be called pg_loopen().
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