pg_put_line()

(PHP 4 >= 4.0.3, PHP 5, PHP 7)

向 PostgreSQL 后端发送以 NULL 结尾的字符串

说明

pg_put_line([resource $connection],string $data): bool

pg_put_line()向 PostgreSQL 后端服务器发送以 NULL 结尾的字符串。例如可以通过 PostgreSQL 的COPY操作来向表中高速插入数据。结尾的 NULL 字符会自动加入。

COPYis a high-speed data loading interface supported by PostgreSQL. Data is passed in without being parsed, and in a single transaction.

An alternative to using raw pg_put_line() commands is to use pg_copy_from(). This is a far simpler interface.

Note:

应用程序必须明确地在pg_end_copy()之前最后一行发送两个字符"."来向后端指明发送数据结束。

Warning

Use of the pg_put_line() causes most large object operations, including pg_lo_read() and pg_lo_tell(), to subsequently fail. You can use pg_copy_from() and pg_copy_to() instead.

参数

$connection

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

$data

A line of text to be sent directly to the PostgreSQL backend. ANULLterminator is added automatically.

返回值

成功时返回TRUE，或者在失败时返回FALSE。

范例

Example #1 pg_put_line()例子

<?php 
  $conn = pg_pconnect("dbname=foo");
  pg_query($conn, "create table bar (a int4, b char(16), d float8)");
  pg_query($conn, "copy bar from stdin");
  pg_put_line($conn, "3\thello world\t4.5\n");
  pg_put_line($conn, "4\tgoodbye world\t7.11\n");
  pg_put_line($conn, "\.\n");
  pg_end_copy($conn);
?>

参见

• pg_end_copy()与 PostgreSQL 后端同步

This is the function you need if you are running into the infamous "must be superuser to COPY to or from a file" error from postgres.