// build the SQL query
		$dbr = wfGetDB( DB_SLAVE );
		$sPageTable = $dbr->tableName( 'page' );
		$sRevTable = $dbr->tableName( 'revision' );
		$categorylinks = $dbr->tableName( 'categorylinks' );
		$sSqlSelectFrom = "SELECT page_namespace, page_title,"
			. " r.rev_user_text, r.rev_timestamp";
		$arg = " FROM $sPageTable INNER JOIN $sRevTable"
			. " AS r ON page_latest = r.rev_id";

		if ( $bCountMode ) {
			$sSqlSelectFrom = "SELECT COUNT(*) AS num_rows FROM $sPageTable";
		} elseif ( ( $this->bAddAuthor || $this->bAddCreationDate ||
		( $sOrder == 'first_time' ) ) && ( ( !$this->restrictNamespace ) ||
		( $iNamespace >= 0 && !in_array( $iNamespace, $this->restrictNamespace ) ) ) ) {
			$sSqlSelectFrom .= ", o.rev_user_text AS first_user, o.rev_timestamp AS"
			. " first_time" . $arg . " INNER JOIN $sRevTable AS o"
			. " ON o.rev_id =( SELECT MIN(q.rev_id) FROM $sRevTable"
			. " AS q WHERE q.rev_page = page_id )";
		} else {
			if ( $sOrder == 'first_time' ) {
				$sOrder = 'page_id';
			}
			$sSqlSelectFrom .= $arg;
		}

		$sSqlWhere = ' WHERE 1=1';
		if ( $iNamespace >= 0 ) {
			$sSqlWhere = ' WHERE page_namespace=' . $iNamespace;
		}

		if ( $sPrefix !== '' ) {
			// Escape SQL special characters
			$sPrefix = strtr( $sPrefix, array( '\\' => '\\\\\\\\',
			' ' => '\\_', '_' => '\\_', '%' => '\\%', '\'' => '\\\'' ) );
			$sSqlWhere .= " AND page_title LIKE BINARY '" . $sPrefix . "%'";
		}

		switch( $this->get( 'redirects' ) ) {
			case 'only':
				$sSqlWhere .= ' AND page_is_redirect = 1';
			case 'include':
				break;
			case 'exclude':
			default:
				$sSqlWhere .= ' AND page_is_redirect = 0';
			break;
		}

		$n = 1;
		for ( $i = 0; $i < $cats; $i++ ) {
			$sSqlSelectFrom .= " INNER JOIN $categorylinks AS" .
			" c{$n} ON page_id = c{$n}.cl_from AND c{$n}.cl_to=" .
			$dbr->addQuotes( $aCategories[$i]->getDBkey() );
			$n++;
		}
		for ( $i = 0; $i < $nocats; $i++ ) {
			$sSqlSelectFrom .= " LEFT OUTER JOIN $categorylinks AS" .
			" c{$n} ON page_id = c{$n}.cl_from AND c{$n}.cl_to=" .
			$dbr->addQuotes( $aExcludeCategories[$i]->getDBkey() );
			$sSqlWhere .= " AND c{$n}.cl_to IS NULL";
			$n++;
		}

		if ( !$bCountMode ) {
			$sSqlWhere .= " ORDER BY $sOrder ";

			if ( $this->get( 'order' ) == 'ascending' ) {
				$sSqlWhere .= 'ASC';
			} else {
				$sSqlWhere .= 'DESC';
			}
		}
		$sSqlWhere .= " LIMIT $start, $count";