pg_copy_from()

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

根据数组将记录插入表中

说明

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

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 FROMSQL 命令来插入记录。

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$rowsbecomes a row in$table_name. Each value in$rowsshould 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 isTAB.
$null_as: How SQLNULLvalues are represented in the$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

pg_copy_to()将一个表拷贝到数组中

Default is "\\\N" not "\\N" at least in php 5.4
pg_copy_from($db, $table_name, "\t", "\\\N")

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);
?>

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

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");
?>

pg syntax is :
COPY test (cola, colb, colc) FROM stdin;
...
this function doesn't let you in which order the columns are !

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)

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.

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);
?>