PostgreSQL Functions
PHP Manual

pg_lo_truncate

Truncates a large object

Description

bool pg_lo_truncate ( resource $large_object , int $size )

pg_lo_truncate truncates a a large object resource.

To use the large object interface, it is necessary to enclose it within a transaction block.

Parameters

large_object

PostgreSQL large object (LOB) resource, returned by pg_lo_open.

size

The number of bytes to truncate.

Return Values

Returns TRUE on success or FALSE on failure.

Examples

Example #1 pg_lo_truncate example

<?php
   $doc_oid = 189762345;
   $database = pg_connect("dbname=jacarta");
   pg_query($database, "begin");
   $handle = pg_lo_open($database, $doc_oid, "r");
   // Truncate to 0
   pg_lo_truncate($handle, 0);
   pg_query($database, "commit");
   echo $data;
?>

Changelog

Version Description
5.6.0 Added truncate function. It supports PostgreSQL 9.3's 64bit large object. Both client and server must support PostgreSQL 9.3 and PHP must be 64bit build to use 64bit large object.

See Also

  • pg_lo_tell