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このドキュメントでは、 php中国語ネットマニュアル リリース
(PHP 5 >= 5.1.2, PECL pdo_pgsql >= 1.0.2)
PDO::pgsqlLOBUnlink — Deletes the large object
$oid
)Deletes a large object from the database identified by OID.
Note: This function must be called within a transaction.
oid
A large object identifier
成功时返回 TRUE
, 或者在失败时返回 FALSE
。
Example #1 A PDO::pgsqlLOBUnlink() example
This example unlinks a large object from the database prior to deleting the row that references it from the blobs table we've been using in our PDO::pgsqlLOBCreate() and PDO::pgsqlLOBOpen() examples.
<?php
$db = new PDO ( 'pgsql:dbname=test host=localhost' , $user , $pass );
$db -> setAttribute ( PDO :: ATTR_ERRMODE , PDO :: ERRMODE_EXCEPTION );
$db -> beginTransaction ();
$db -> pgsqlLOBUnlink ( $oid );
$stmt = $db -> prepare ( "DELETE FROM BLOBS where ident = ?" );
$stmt -> execute (array( $some_id ));
$db -> commit ();
?>