PostgreSQL 函数
在线手册：中文 英文
PHP手册

pg_copy_from

(PHP 4 >= 4.2.0, PHP 5)

pg_copy_from — 根据数组将记录插入表中

说明

bool pg_copy_from ( resource $connection , string $table_name , array $rows [, string $delimiter [, string $null_as ]] )

pg_copy_from() 将数组 rows 的内容作为记录插入表中。它在内部使用了 COPY FROM SQL 命令来插入记录。成功时返回 TRUE， 或者在失败时返回 FALSE.

参见 pg_copy_to()。

参数

connection

PostgreSQL database connection resource.

table_name

Name of the table into which to copy the rows.

rows

An array of data to be copied into table_name. Each value in rows becomes a row in table_name. Each value in rows should be a delimited string of the values to insert into each field. Values should be linefeed terminated.

delimiter

The token that separates values for each field in each element of rows. Default is TAB.

null_as

How SQL NULL values are represented in the rows. Default is \N ("\N").

返回值

成功时返回 TRUE， 或者在失败时返回 FALSE.

范例

Example #1 pg_copy_from() example

<?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

PostgreSQL 函数
在线手册：中文 英文
PHP手册
PHP手册 - N: 根据数组将记录插入表中

用户评论:

Dave (26-Jan-2012 06:40)

As of postgresql 9.1 "standard_conforming_strings" is set to on

This will not work anymore
<?php
$copy_message = "1\t\\N\t300";
pg_copy_from($db, "message", $copy_message);
?>
result will be a "N" in that field. if the field allow text that is else it will fail to insert the post.

simple fix
<?php
$copy_message = "1\t\\NULL\t300";
pg_copy_from($db, "message", $copy_message, "\t","\\NULL");
?>

Dave (18-Feb-2011 10:39)

Fix for "Copy command failed: ERROR: literal carriage return
found in data" or
"Copy command failed: ERROR: missing data for column
"message" CONTEXT: COPY message, line 1:"

<?php
$message = "HEJ\rHEJ\nHEJ\r\nHEJ\n\rHEJ\tHELLO\\";

$message = addslashes($message);

$message = str_replace(
  array("\n","\r","\t"),
  array("\\n","\\r","\\t"),
  $message);

$copy_message = "1\t". $message ."\t300";

pg_copy_from($db, "message", $copy_message);
?>

etiger13 at gmail dot com (17-Nov-2009 07:10)

This will not look in other schema's, only the schema's in your search path. You can temporarily change this behavior with the following code:

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

$copy_from = pg_copy_from($conn, 'tablename', $filetoarray, ",");
   
if ( !$copy_from )
{
    echo pg_last_error($conn);
       
    exit;
}

pg_query("RESET search_path;");
?>

Anonymous (11-Jun-2009 11:08)

see also: pg_put_line for a solution that does not require buffering of all the data to be copied,

kapouer_php at melix dot org (26-Aug-2007 10:24)

pg syntax is :
COPY test (cola, colb, colc) FROM stdin;
...

this function doesn't let you in which order the columns are !

vlad at php dot net (19-Mar-2003 09:38)

By default NULL values are a backslash followed with capital N ("\\N").

Also, you can't insert entries with OIDs (I've added it to my TODO list though)

carl at thep.lu.se (10-Sep-2002 11:06)

Something needs to be said about the format of the array.
Judging by what I've seen, it's pretty much what you get
from loading a tab-separated file with file(). That is, the
lines are linefeed-terminated and there's no need to have
an extra line with "\.". On the other hand, when I try using this
command the connection to the server ends up in some odd
state and is then lost:
PHP Warning:  USo() query failed: server closed the connection unexpectedly

I think it might be safer to use the lower-level function
pg_put_line() for now.