PHP 5.5.17 is available

pg_lo_truncate

(バージョン情報なし。おそらく SVN 版にしか存在しないでしょう)

pg_lo_truncate Truncates a large object

説明

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.

パラメータ

large_object

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

size

The number of bytes to truncate.

返り値

成功した場合に TRUE を、失敗した場合に FALSE を返します。

例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;
?>

変更履歴

バージョン 説明
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.

参考

  • pg_lo_tell() - ラージオブジェクトのカレントのシーク位置を返す

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