pg_copy_from

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

pg_copy_from Fügt Datensätze aus einem Array in eine Tabelle ein

Beschreibung

pg_copy_from(
    PgSql\Connection $connection,
    string $table_name,
    array $rows,
    string $separator = "\t",
    string $null_as = "\\\\N"
): bool

pg_copy_from() fügt Datensätze aus einem Array in eine Tabelle ein. Intern wird der COPY-Befehl aufgerufen, um die Datensätze einzufügen. Bei Erfolg gibt die Funktion true zurück, false sonst.

Parameter-Liste

connection

Eine PgSql\Connection-Instanz.

table_name

Name der Tabelle, in die die rows eingefügt werden.

rows

Ein array mit Werten, die in die table_name eingefügt werden. Jedes Element von rows wird zu einer Zeile in table_name. Die Elemente in rows müssen Strings mit Feldbegrenzern sein, und mit einem Zeilenvorschub abgeschlossen sein.

separator

Der Feldbegrenzer, mit dem die Werte in den Elementen von rows separiert werden. Der Vorgabewert ist \t.

null_as

Bestimmt, wie SQL NULL Werte in rows dargestellt werden. Der Standardwert ist \\N ("\\\\N").

Rückgabewerte

Gibt bei Erfolg true zurück. Bei einem Fehler wird false zurückgegeben.

Changelog

Version Beschreibung
8.1.0 Der Parameter connection erwartet nun eine PgSql\Connection-Instanz; vorher wurde eine Ressource erwartet.

Beispiele

Beispiel #1 pg_copy_from() Beispiel

<?php
$db
= pg_connect("dbname=publisher") or die("Konnte keine Verbindung aufbauen");

$rows = pg_copy_to($db, $table_name);

pg_query($db, "DELETE FROM $table_name");

pg_copy_from($db, $table_name, $rows);
?>

Siehe auch

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User Contributed Notes 9 notes

up
6
karlo dot petravic at hotmail dot com
4 years 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
10 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
3 years 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
14 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
12 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
20 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
21 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:  UåSèo() 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
16 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
13 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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