pg_lo_truncate

(PHP 5 >= 5.6.0, PHP 7, PHP 8)

pg_lo_truncate Truncates a large object

说明

pg_lo_truncate(PgSql\Lob $lob, int $size): bool

pg_lo_truncate() truncates an PgSql\Lob instance.

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

参数

lob

An PgSql\Lob instance, 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

更新日志

版本 说明
8.1.0 The lob parameter expects an PgSql\Lob instance now; previously, a 资源(resource) was expected.

范例

示例 #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;
?>

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