(PHP 4 >= 4.2.0, PHP 5)
pg_copy_from — 根据数组将记录插入表中
$connection
, string $table_name
, array $rows
[, string $delimiter
[, string $null_as
]] )
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 FROM SQL 命令来插入记录。
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 rows becomes a row in table_name.
Each value in rows should 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 is TAB.
null_as
How SQL NULL values are represented in the
rows. Default is \N ("\N").
成功时返回 TRUE， 或者在失败时返回 FALSE。
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);
?>
Dave (2012-01-26 10:40:41)
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");
?>
Dave (2011-02-18 02:39:45)
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", $copy_message);
?>
etiger13 at gmail dot com (2009-11-17 11:10:47)
This will not look in other schema's, only the schema's in your search path. You can temporarily change this behavior with the following code:
<?php
pg_query($conn, "SET search_path TO myschema;");
$copy_from = pg_copy_from($conn, 'tablename', $filetoarray, ",");
if ( !$copy_from )
{
echo pg_last_error($conn);
exit;
}
pg_query("RESET search_path;");
?>
Anonymous (2009-06-11 03:08:05)
see also: pg_put_line for a solution that does not require buffering of all the data to be copied,
kapouer_php at melix dot org (2007-08-26 14:24:13)
pg syntax is :
COPY test (cola, colb, colc) FROM stdin;
...
this function doesn't let you in which order the columns are !
vlad at php dot net (2003-03-19 13:38:45)
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)
carl at thep.lu.se (2002-09-10 03:06:52)