PHP-Handbuch: Truncates a large object

Beschreibung

bool pg_lo_truncate ( resource $large_object , int $size )

pg_lo_truncate truncates a large object resource.

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

Parameter-Liste

large_object: PostgreSQL large object (LOB) resource, returned by pg_lo_open.
size: The number of bytes to truncate.

Rückgabewerte

Gibt bei Erfolg TRUE zurück. Im Fehlerfall wird FALSE zurückgegeben.

Beispiele

Beispiel #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	Beschreibung
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.

Siehe auch

pg_lo_tell