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diff --git a/includes/SearchIBM_DB2.php b/includes/SearchIBM_DB2.php
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+<?php
+# Copyright (C) 2004 Brion Vibber <brion@pobox.com>
+# http://www.mediawiki.org/
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+# http://www.gnu.org/copyleft/gpl.html
+
+/**
+ * @file
+ * @ingroup Search
+ */
+
+/**
+ * Search engine hook base class for IBM DB2
+ * @ingroup Search
+ */
+class SearchIBM_DB2 extends SearchEngine {
+	function __construct($db) {
+		$this->db = $db;
+	}
+
+	/**
+	 * Perform a full text search query and return a result set.
+	 *
+	 * @param string $term - Raw search term
+	 * @return IBM_DB2SearchResultSet
+	 * @access public
+	 */
+	function searchText( $term ) {
+		$resultSet = $this->db->resultObject($this->db->query($this->getQuery($this->filter($term), true)));
+		return new IBM_DB2SearchResultSet($resultSet, $this->searchTerms);
+	}
+
+	/**
+	 * Perform a title-only search query and return a result set.
+	 *
+	 * @param string $term - Raw search term
+	 * @return IBM_DB2SearchResultSet
+	 * @access public
+	 */
+	function searchTitle($term) {
+		$resultSet = $this->db->resultObject($this->db->query($this->getQuery($this->filter($term), false)));
+		return new MySQLSearchResultSet($resultSet, $this->searchTerms);
+	}
+
+
+	/**
+	 * Return a partial WHERE clause to exclude redirects, if so set
+	 * @return string
+	 * @private
+	 */
+	function queryRedirect() {
+		if ($this->showRedirects) {
+			return '';
+		} else {
+			return 'AND page_is_redirect=0';
+		}
+	}
+
+	/**
+	 * Return a partial WHERE clause to limit the search to the given namespaces
+	 * @return string
+	 * @private
+	 */
+	function queryNamespaces() {
+		if( is_null($this->namespaces) )
+			return '';
+		$namespaces = implode(',', $this->namespaces);
+		if ($namespaces == '') {
+			$namespaces = '0';
+		}
+		return 'AND page_namespace IN (' . $namespaces . ')';
+	}
+
+	/**
+	 * Return a LIMIT clause to limit results on the query.
+	 * @return string
+	 * @private
+	 */
+	function queryLimit($sql) {
+		return $this->db->limitResult($sql, $this->limit, $this->offset);
+	}
+
+	/**
+	 * Does not do anything for generic search engine
+	 * subclasses may define this though
+	 * @return string
+	 * @private
+	 */
+	function queryRanking($filteredTerm, $fulltext) {
+		// requires Net Search Extender or equivalent
+		// return ' ORDER BY score(1)';
+		return '';
+	}
+
+	/**
+	 * Construct the full SQL query to do the search.
+	 * The guts shoulds be constructed in queryMain()
+	 * @param string $filteredTerm
+	 * @param bool $fulltext
+	 * @private
+	 */
+	function getQuery( $filteredTerm, $fulltext ) {
+		return $this->queryLimit($this->queryMain($filteredTerm, $fulltext) . ' ' .
+			$this->queryRedirect() . ' ' .
+			$this->queryNamespaces() . ' ' .
+			$this->queryRanking( $filteredTerm, $fulltext ) . ' ');
+	}
+
+
+	/**
+	 * Picks which field to index on, depending on what type of query.
+	 * @param bool $fulltext
+	 * @return string
+	 */
+	function getIndexField($fulltext) {
+		return $fulltext ? 'si_text' : 'si_title';
+	}
+
+	/**
+	 * Get the base part of the search query.
+	 *
+	 * @param string $filteredTerm
+	 * @param bool $fulltext
+	 * @return string
+	 * @private
+	 */
+	function queryMain( $filteredTerm, $fulltext ) {
+		$match = $this->parseQuery($filteredTerm, $fulltext);
+		$page        = $this->db->tableName('page');
+		$searchindex = $this->db->tableName('searchindex');
+		return 'SELECT page_id, page_namespace, page_title ' .
+			"FROM $page,$searchindex " .
+			'WHERE page_id=si_page AND ' . $match;
+	}
+
+	/** @todo document */
+	function parseQuery($filteredText, $fulltext) {
+		global $wgContLang;
+		$lc = SearchEngine::legalSearchChars();
+		$this->searchTerms = array();
+
+		# FIXME: This doesn't handle parenthetical expressions.
+		$m = array();
+		$q = array();
+
+		if (preg_match_all('/([-+<>~]?)(([' . $lc . ']+)(\*?)|"[^"]*")/',
+			  $filteredText, $m, PREG_SET_ORDER)) {
+			foreach($m as $terms) {
+				$q[] = $terms[1] . $wgContLang->stripForSearch($terms[2]);
+
+				if (!empty($terms[3])) {
+					$regexp = preg_quote( $terms[3], '/' );
+					if ($terms[4])
+						$regexp .= "[0-9A-Za-z_]+";
+				} else {
+					$regexp = preg_quote(str_replace('"', '', $terms[2]), '/');
+				}
+				$this->searchTerms[] = $regexp;
+			}
+		}
+
+		$searchon = $this->db->strencode(join(',', $q));
+		$field = $this->getIndexField($fulltext);
+		
+		// requires Net Search Extender or equivalent
+		//return " CONTAINS($field, '$searchon') > 0 ";
+		
+		return " lcase($field) LIKE lcase('%$searchon%')";
+	}
+
+	/**
+	 * Create or update the search index record for the given page.
+	 * Title and text should be pre-processed.
+	 *
+	 * @param int $id
+	 * @param string $title
+	 * @param string $text
+	 */
+	function update($id, $title, $text) {
+		$dbw = wfGetDB(DB_MASTER);
+		$dbw->replace('searchindex',
+			array('si_page'),
+			array(
+				'si_page' => $id,
+				'si_title' => $title,
+				'si_text' => $text
+			), 'SearchIBM_DB2::update' );
+		// ?
+		//$dbw->query("CALL ctx_ddl.sync_index('si_text_idx')");
+		//$dbw->query("CALL ctx_ddl.sync_index('si_title_idx')");
+	}
+
+	/**
+	 * Update a search index record's title only.
+	 * Title should be pre-processed.
+	 *
+	 * @param int $id
+	 * @param string $title
+	 */
+	function updateTitle($id, $title) {
+		$dbw = wfGetDB(DB_MASTER);
+
+		$dbw->update('searchindex',
+			array('si_title' => $title),
+			array('si_page'  => $id),
+			'SearchIBM_DB2::updateTitle',
+			array());
+	}
+}
+
+/**
+ * @ingroup Search
+ */
+class IBM_DB2SearchResultSet extends SearchResultSet {
+	function __construct($resultSet, $terms) {
+		$this->mResultSet = $resultSet;
+		$this->mTerms = $terms;
+	}
+
+	function termMatches() {
+		return $this->mTerms;
+	}
+
+	function numRows() {
+		return $this->mResultSet->numRows();
+	}
+
+	function next() {
+		$row = $this->mResultSet->fetchObject();
+		if ($row === false)
+			return false;
+		return new SearchResult($row);
+	}
+}