K2.4 has its own parentheses support

modules/gallery/libraries/MY_Database.php

@@ -17,45 +17,9 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA  02110-1301, USA.
  */
-class Database extends Database_Core {
+abstract class Database extends Database_Core {
   protected $_table_names;
 
-  public function open_paren() {
-    $this->where[] = "(";
-    return $this;
-  }
-
-  public function close_paren() {
-    // Search backwards for the last opening paren and resolve it
-    $i = count($this->where) - 1;
-    $this->where[$i] .= ")";
-    while (--$i >= 0) {
-      if ($this->where[$i] == "(") {
-        // Remove the paren from the where clauses, and add it to the right of the operator of the
-        // next where clause.  If removing the paren makes the next where clause the first element
-        // in the where list, then the operator shouldn't be there.  It's there because we
-        // calculate whether or not we need an operator based on the number of where clauses, and
-        // the open paren seems like a where clause even though it isn't.
-        array_splice($this->where, $i, 1);
-        $this->where[$i] = preg_replace("/^(AND|OR) /", $i ? "\\1 (" : "(", $this->where[$i]);
-        return $this;
-      }
-    }
-
-    throw new Kohana_Database_Exception('database.missing_open_paren');
-  }
-
-  /**
-   * Parse the query string and convert any strings of the form `\([a-zA-Z0-9_]*?)\]
-   * table prefix . $1
-   */
-  public function query($sql = '') {
-    if (!empty($sql)) {
-      $sql = $this->add_table_prefixes($sql);
-    }
-    return parent::query($sql);
-  }
-
   public function add_table_prefixes($sql) {
     $prefix = $this->config["table_prefix"];
     if (strpos($sql, "SHOW TABLES") === 0) {