pg_lo_truncate

(PHP 5 >= 5.6.0, PHP 7)

pg_lo_truncate Truncates a large object

Opis

pg_lo_truncate ( resource $large_object , int $size ) : bool

pg_lo_truncate() truncates a large object resource.

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

Parametry

large_object

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

size

The number of bytes to truncate.

Zwracane wartości

Zwraca TRUE w przypadku powodzenia, FALSE w przypadku błędu.

Przykłady

Przykład #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($handle0);
   
pg_query($database"commit");
   echo 
$data;
?>

Rejestr zmian

Wersja Opis
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.

Zobacz też:

  • pg_lo_tell() - Zwraca wskaźnik położenia w wielkim obiekcie (Large Object - LO)

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