pg_copy_from

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

pg_copy_from 配列からテーブルに挿入する

説明

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

pg_copy_from() は、rows の内容をテーブルに挿入します。レコードを挿入するために、内部では COPY FROM SQL コマンドを発行します。

パラメータ

connection

PostgreSQL データベースの接続リソース。

table_name

rows をコピーするテーブルの名前。

rows

table_name にコピーするデータの配列。 rows の個々の値が table_name のひとつの行となります。rows の個々の値は、 それぞれのフィールドに対応する値が区切り文字で区切られており、最後は 改行で終了していなければなりません。

delimiter

rows の要素内で、各フィールドに対応する値を 区切る文字。デフォルトは TAB です。

null_as

rows の中で、SQL の NULL をどのように表現するか。デフォルトは \N ("\\N") です。

返り値

成功した場合に TRUE を、失敗した場合に FALSE を返します。

例1 pg_copy_from() の例

<?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);
?>

参考

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User Contributed Notes 9 notes

up
3
karlo dot petravic at hotmail dot com
1 year ago
As table name you can also specify columns you want imported.

Will import all columns:
<?php
pg_copy_from
($db, 'cpm.ics', $rows);
?>

Will import only specified columns:
<?php
pg_copy_from
($db, 'cpm.ics (type, product, date, count, amount)', $rows);
?>
up
2
Dave
6 years ago
Default is "\\\N" not "\\N" at least in php 5.4

pg_copy_from($db, $table_name, "\t", "\\\N")
up
1
smcbride at msn dot com
2 months ago
When using this function, don't get bit by the double quote (") vs. single quote (') differences.  It is a small thing, but the error messaging is misleading.  If you use a single quote, you will see the \t separated values all try to be inserted into the first field.

Small consideration, but will save someone who is working late and can't get these functions to work.
up
1
Anonymous
11 years ago
see also: pg_put_line for a solution that does not require buffering of all the data to be copied,
up
0
Dave
8 years ago
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");
?>
up
0
vlad at php dot net
17 years ago
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)
up
-1
carl at thep.lu.se
18 years ago
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.
up
-2
kapouer_php at melix dot org
13 years ago
pg syntax is :
COPY test (cola, colb, colc) FROM stdin;
...

this function doesn't let you in which order the columns are !
up
-10
Dave
9 years ago
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);
?>
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