pg_lo_truncate

(No version information available, might only be in Git)

pg_lo_truncate Truncates a large object

说明

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.

参数

large_object

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

size

The number of bytes to truncate.

返回值

成功时返回 TRUE, 或者在失败时返回 FALSE

范例

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

更新日志

版本 说明
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.

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