pg_copy_to

(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)

pg_copy_to — 将表复制到数组

说明

pg_copy_to(
    PgSql\Connection $connection,
    string $table_name,
    string $separator = "\t",
    string $null_as = "\\\\N"
): array|false

pg_copy_to() 将表复制到数组。在内部发出 COPY TO 命令来检索记录。

参数

connection: PgSql\Connection 实例。
table_name: 从表中将数据复制到 rows 中的表名。
separator: rows 的每个元素分割为每个字段的值的标记。默认为 \t。
null_as: SQL NULL 值在 rows 中的表示方式。默认为 \\N（"\\\\N"）。

返回值

COPY 数据的每一行都作为一个元素组成的 array，或者在失败时返回 false。

更新日志

版本	说明
8.1.0	现在 `connection` 参数接受 PgSql\Connection 实例，之前接受 resource。

示例

示例 #1 pg_copy_to() 示例

<?php
   $db = pg_connect("dbname=publisher") or die("Could not connect");
   
   $rows = pg_copy_to($db, $table_name);
   
   pg_query($db, "DELETE FROM $table_name");
   
   pg_copy_from($db, $table_name, $rows);
?>

参见

pg_copy_from() - 将数组中的记录插入到表

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用户贡献的备注 3 notes

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John M ¶

4 years ago

Worth noting here that just like the COPY TO statement in PostgreSQL, '$table_name' can include a list of columns or be a select query as well.
e.g.:
$rows = pg_copy_to($db,'schema."TableName" (column1, column2, ...)';
$rows = pg_copy_to($db,'(SELECT ...)');

down

setantae at submonkey dot net ¶

21 years ago

"It issues COPY TO SQL command internally to insert records"

I suspect this statement is incorrect, or that s/insert/retrieve/ is appropriate.

down

-3

etiger13 at gmail dot com ¶

14 years ago

You cannot specify the schema name in this command. You can change the search path for just one query by using the following code: 



<?php

pg_query($conn, "SET search_path TO myschema;");

    

$copy_to = pg_copy_to($conn, 'tablename');

    

pg_query("RESET search_path;");

?>