PHP 5.4.32 Released

pg_copy_from

(PHP 4 >= 4.2.0, PHP 5)

pg_copy_from Insertar registros dentro de una tabla desde un array

Descripción

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

La función pg_copy_from() inserta registros dentro de una tabla desde el parámetro rows. Esta realiza internamente un comando SQL COPY FROM para insertar registros.

Parámetros

connection

Recurso de conexión a la base de datos PostgreSQL.

table_name

Nombre de la tabla en la cual se copiará lo que provenga de rows.

rows

Un array de datos a ser copiados dentro de table_name. Cada valor en el parámetro rows se convierte en una fila en table_name. Cada valor en el parámetro rows debe ser una cadena delimitada de los valores a insertar en cada campo. Los valores deben ser terminados con un salto de línea.

delimiter

Símbolo que serpara valores por cada campo en cada elemento del parámetro rows. El predeterminado es TAB.

null_as

Es como SQL NULL (anula) los valores que son representados en el parámetro rows. El predeterminado es \N ("\\N").

Valores devueltos

Devuelve TRUE en caso de éxito o FALSE en caso de error.

Ejemplos

Ejemplo #1 Ejemplo de la función pg_copy_from()

<?php
   $db 
pg_connect("dbname=publisher") or die("No se pudo conectar");
   
   
$rows pg_copy_to($db$table_name);
   
   
pg_query($db"DELETE FROM $table_name");
   
   
pg_copy_from($db$table_name$rows);
?>

Ver también

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User Contributed Notes 7 notes

up
1
kapouer_php at melix dot org
6 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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0
Dave
5 months ago
Default is "\\\N" not "\\N" at least in php 5.4

pg_copy_from($db, $table_name, "\t", "\\\N")
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0
Dave
2 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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0
Anonymous
5 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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0
vlad at php dot net
11 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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0
carl at thep.lu.se
11 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
Dave
3 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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