php 한글 메뉴얼 도움말 검색 사이트 Truncates a large object [function.pg-lo-truncate]

설명

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.

인수

large_object: PostgreSQL large object (LOB) resource, returned by pg_lo_open().
size: The number of bytes to truncate.

반환값

성공 시 TRUE를, 실패 시 FALSE를 반환합니다.

예제

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;
?>

변경점

버전	설명
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.

참고

pg_lo_tell() - Returns current seek position a of large object