Merge pull request #1416 from greezybacon/issue/cluster-search

InnoDB tables for search indexing where possible

Reviewed-By: Peter Rotich <peter@osticket.com>

include/class.search.php

@@ -403,14 +403,30 @@ class MysqlSearchBackend extends SearchBackend {
     }
 
     static function createSearchTable() {
-        $sql = 'CREATE TABLE IF NOT EXISTS '.TABLE_PREFIX.'_search (
+        // Use InnoDB with Galera, MyISAM with v5.5, and the database
+        // default otherwise
+        $sql = "select count(*) from information_schema.tables where
+            table_schema='information_schema' and table_name =
+            'INNODB_FT_CONFIG'";
+        $mysql56 = db_result(db_query($sql));
+
+        $sql = "show status like 'wsrep_local_state'";
+        $galera = db_result(db_query($sql));
+
+        if ($galera && !$mysql56)
+            throw new Exception('Galera cannot be used with MyISAM tables');
+        $engine = $galera ? 'InnodB' : ($mysql56 ? '' : 'MyISAM');
+        if ($engine)
+            $engine = 'ENGINE='.$engine;
+
+        $sql = 'CREATE TABLE IF NOT EXISTS '.TABLE_PREFIX."_search (
             `object_type` varchar(8) not null,
             `object_id` int(11) unsigned not null,
             `title` text collate utf8_general_ci,
             `content` text collate utf8_general_ci,
             primary key `object` (`object_type`, `object_id`),
             fulltext key `search` (`title`, `content`)
-        ) ENGINE=MyISAM CHARSET=utf8';
+        ) $engine CHARSET=utf8";
         return db_query($sql);
     }