simplify bookmarks tag filter sql

apps/bookmarks/ajax/updateList.php

@@ -39,13 +39,9 @@ $params=array(OC_User::getUser());
 $CONFIG_DBTYPE = OC_Config::getValue( "dbtype", "sqlite" );
 
 //Filter for tag?
-$filterTag = isset($_GET["tag"]) ? urldecode($_GET["tag"]) : false;
+$filterTag = isset($_GET["tag"]) ? '%' . urldecode($_GET["tag"]) . '%' : false;
 if($filterTag){
-	if( $CONFIG_DBTYPE == 'sqlite' or $CONFIG_DBTYPE == 'sqlite3' ){
-		$sqlFilterTag = "HAVING tags LIKE '%' || ? || '%'";
-	} else {
-		$sqlFilterTag = "HAVING INSTR (tags, ?) > 0";
-	} 
+	$sqlFilterTag = 'HAVING tags LIKE ?';
 	$params[] = $filterTag;
 } else {
 	$sqlFilterTag = '';