pg_copy_from

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

pg_copy_from — Wstawia wiersze do tabeli z tablicy

Opis

pg_copy_from ( resource $połączenie , string $nazwa_tabeli , array $wiersze [, string $delimiter [, string $null_jako ]] ) : bool

pg_copy_from() wstawia wiersze do tabeli z tablicy wiersze. Wywołuje wewnętrznie polecenie SQL COPY FROM aby wstawić wiersze. Zwraca TRUE w przypadku powodzenia, FALSE w przypadku błędu.

Parametry

połączenie: Zasób, połączenie do bazy danych PostgreSQL.
nazwa_tabeli: Nazwa tabeli do której będą kopiowane wiersze.
wiersze: Tablica danych, które będą skopiowane do nazwa_tabeli. Każda wartość w wiersze stanie się wierszem w nazwa_tabeli. Każda wartość w wiersze powinna być łańcuchem znaków rozdzielonych wartości do wstawienia w każde pole. Wartości powinny być zakończone przejściem do nowej linii.
delimiter: Symbol jaki rozdziela wartości dla każdego pola w każdym elemencie wiersza. Domyślnie jest to TAB.
null_jako: Jak wartość SQL NULL jest reprezentowana w wierszu. Domyślnie jest to \N ("\\N").

Zwracane wartości

Zwraca TRUE w przypadku powodzenia, FALSE w przypadku błędu.

Przykłady

Przykład #1 pg_copy_from() przykład


<?php
   $db = pg_connect("dbname=publisher") or die("Nie można się połączyć");
   
   $rows = pg_copy_to($db, $table_name);
   
   pg_query($db, "DELETE FROM $table_name");
   
   pg_copy_from($db, $table_name, $rows);
?>

Zobacz też:

pg_copy_to() - Kopiuje tabelę do tablicy

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User Contributed Notes 9 notes

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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);
?>

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Dave ¶

10 years ago


Default is "\\\N" not "\\N" at least in php 5.4

pg_copy_from($db, $table_name, "\t", "\\\N")

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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.

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Anonymous ¶

14 years ago


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

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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");
?>

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vlad at php dot net ¶

21 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)

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-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:  U�S�o() query failed: server closed the connection unexpectedly

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

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-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 !

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-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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