Php/docs/function.pg-lo-import

• PHP Manual
• PostgreSQL 函数
• 将文件导入为大型对象

pg_lo_import

(PHP 4 >= 4.2.0, PHP 5, PHP 7)

pg_lo_import — 将文件导入为大型对象

说明

pg_lo_import ([ resource $connection ], string $pathname [, mixed $object_id ] ) : int

pg_lo_import() creates a new large object in the database using a file on the filesystem as its data source.

要使用大型对象（lo）接口，需要将其放置在事务块中。

Note:

本函数以前的名字为 pg_loimport()。

参数

connection

PostgreSQL database connection resource. When connection is not present, the default connection is used. The default connection is the last connection made by pg_connect() or pg_pconnect().

pathname

变量指明了要导入为大型对象的文件名。

object_id

If an object_id is given the function will try to create a large object with this id, else a free object id is assigned by the server. The parameter was added in PHP 5.3 and relies on functionality that first appeared in PostgreSQL 8.1.

返回值

导入成功则返回新建的大型对象的 OID，如果出错则返回 false。

范例

Example #1 pg_lo_import() 例子

<?php   $database = pg_connect("dbname=jacarta");   pg_query($database, "begin");   $oid = pg_lo_import($database, '/tmp/lob.dat');   pg_query($database, "commit");?>

参见

• pg_lo_export() - 将大型对象导出到文件
• pg_lo_open() - 打开一个大型对象