pg_lo_truncate truncates an PgSql\Lob instance.
To use the large object interface, it is necessary to enclose it within a transaction block.
An PgSql\Lob instance, returned by pg_lo_open.
The number of bytes to truncate.
Returns true on success or false on failure.
|8.1.0||The lob parameter expects an PgSql\Lob instance now; previously, a resource was expected.|