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<?php
/**
* Conditional upgrade for UTF8 as described in http://trac.elgg.org/ticket/1928
*/
// get_version() returns the code version.
// we want the DB version.
$dbversion = (int) datalist_get('version');
// 2009100701 was the utf8 upgrade for 1.7.
// if we've already upgraded, don't try again.
if ($dbversion < 2009100701) {
// if the default client connection is utf8 there is no reason
// to run this upgrade because the strings are already stored correctly.
// start a new link to the DB to see what its defaults are.
$link = mysql_connect($CONFIG->dbhost, $CONFIG->dbuser, $CONFIG->dbpass, TRUE);
mysql_select_db($CONFIG->dbname, $link);
$q = "SHOW VARIABLES LIKE 'character_set_client'";
$r = mysql_query($q);
$client = mysql_fetch_assoc($r);
$q = "SHOW VARIABLES LIKE 'character_set_connection'";
$r = mysql_query($q);
$connection = mysql_fetch_assoc($r);
// only run upgrade if not already talking utf8.
if ($client['Value'] != 'utf8' && $connection['Value'] != 'utf8') {
$qs = array();
$qs[] = "SET NAMES utf8";
$qs[] = "ALTER TABLE {$CONFIG->dbprefix}metastrings DISABLE KEYS";
$qs[] = "REPLACE INTO {$CONFIG->dbprefix}metastrings (id, string)
SELECT id, unhex(hex(convert(string using latin1)))
FROM {$CONFIG->dbprefix}metastrings";
$qs[] = "ALTER TABLE {$CONFIG->dbprefix}metastrings ENABLE KEYS";
$qs[] = "ALTER TABLE {$CONFIG->dbprefix}groups_entity DISABLE KEYS";
$qs[] = "REPLACE INTO {$CONFIG->dbprefix}groups_entity (guid, name, description)
SELECT guid, unhex(hex(convert(name using latin1))),
unhex(hex(convert(description using latin1)))
FROM {$CONFIG->dbprefix}groups_entity";
$qs[] = "ALTER TABLE {$CONFIG->dbprefix}groups_entity ENABLE KEYS";
$qs[] = "ALTER TABLE {$CONFIG->dbprefix}objects_entity DISABLE KEYS";
$qs[] = "REPLACE INTO {$CONFIG->dbprefix}objects_entity (guid, title, description)
SELECT guid, unhex(hex(convert(title using latin1))),
unhex(hex(convert(description using latin1)))
FROM {$CONFIG->dbprefix}objects_entity";
$qs[] = "ALTER TABLE {$CONFIG->dbprefix}objects_entity ENABLE KEYS";
$qs[] = "ALTER TABLE {$CONFIG->dbprefix}users_entity DISABLE KEYS";
$qs[] = "REPLACE INTO {$CONFIG->dbprefix}users_entity
(guid, name, username, password, salt, email, language, code,
banned, last_action, prev_last_action, last_login, prev_last_login)
SELECT guid, unhex(hex(convert(name using latin1))),
username, password, salt, email, language, code,
banned, last_action, prev_last_action, last_login, prev_last_login
FROM {$CONFIG->dbprefix}users_entity";
$qs[] = "ALTER TABLE {$CONFIG->dbprefix}users_entity ENABLE KEYS";
foreach ($qs as $q) {
if (!update_data($q)) {
throw new Exception('Couldn\'t execute upgrade query: ' . $q);
}
}
}
}
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