When we worked on maintenance mode in Database MySQL on Drupal sites, sometime we need to change Our Prefix Tables at new database server, this is a simple trick if you don't want to change one by one table name :)
This is simple script PHP to use it.
<?php
/* script code by Praetorian Alexandria. */
/* global9.net | Belida.com (c) 2011 */
$db_server = 'localhost'; // if this script in your DB server on localhost
$db_username = 'dbusername'; // DB username
$db_password = 'pwdusername'; // PASSWORD DB username
$db_name = 'databasename'; // Name of your Database
$pattern = "oldexample_"; // Old Prefix Name Table
$new_pattern = "newexample_"; // New Prefix Name Table (e.g. "newexample_")
// login to MySQL server
$link = mysql_connect( $db_server, $db_username, $db_password);
if (!$link)
{
die('Could not connect: ' . mysql_error());
}
// list all tables in the database containing the search pattern
$sql = "SHOW TABLES FROM `" . $db_name . "`";
$sql .= " LIKE '%" . $pattern . "%'";
$result = mysql_query ( $sql, $link );
if (!$result)
{
die("Invalid query: " . mysql_error( $link ));
}
$renamed = 0;
$failed = 0;
while ( $row = mysql_fetch_array ($result) )
{
// rename every table by replacing the search pattern
// with a new pattern
$table_name = $row[0];
$new_table_name = str_replace ( $pattern, $new_pattern, $table_name);
$sql = "RENAME TABLE `" . $db_name . "`.`" . $table_name . "`";
$sql .= " TO `" . $db_name . "`.`" . $new_table_name . "`";
$result_rename = mysql_query ( $sql, $link );
if ($result_rename)
{
echo "Table `" . $table_name . "` renamed to :`";
echo $new_table_name . "`.\n";
$renamed++;
}
else
{
// notify when the renaming failed and show reason why
echo "Renaming of table `" . $table_name . "` has failed: ";
echo mysql_error( $link ) . "\n";
$failed++;
}
}
echo $renamed . " tables were renamed, " . $failed . " failed.\n";
// close connection to MySQL server
mysql_close( $link );
?>
