jQuery mobile类库使用时加载导航历史的方法简介
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2024-03-18
(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 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, $doc_oid, "r");
// Truncate to 0
pg_lo_truncate($handle, 0);
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.
参见
pg_lo_tell() - 返回大型对象的当前指针位置
