PHP マニュアル: Deletes the large object

説明

public bool Pdo\Pgsql::lobUnlink(string $oid)

Deletes a large object from the database identified by OID.

注意: This function, and all manipulations of the large object, must be called and carried out within a transaction.

パラメータ

oid: A large object identifier.

戻り値

成功した場合に true を、失敗した場合に false を返します。

例

例1 Pdo\Pgsql::lobUnlink example

This example unlinks a large object from the database prior to deleting the row that references it from the blobs table are used in the examples of Pdo\Pgsql::lobCreate and Pdo\Pgsql::lobOpen.

<?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();
?>

参考

Pdo\Pgsql::lobCreate
Pdo\Pgsql::lobOpen
pg_lo_create
pg_lo_open