/*
* Copyright (c) 2013, OpenCloudDB/MyCAT and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software;Designed and Developed mainly by many Chinese
* opensource volunteers. you can redistribute it and/or modify it under the
* terms of the GNU General Public License version 2 only, as published by the
* Free Software Foundation.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Any questions about this component can be directed to it's project Web address
* https://code.google.com/p/opencloudb/.
*
*/
package com.akiban.sql.parser;
/**
* A GroupByList represents the list of expressions in a GROUP BY clause in
* a SELECT statement.
*
*/
public class GroupByList extends OrderedColumnList<GroupByColumn>
{
boolean rollup = false;
/**
* Add a column to the list
*
* @param column The column to add to the list
*/
public void addGroupByColumn(GroupByColumn column) {
add(column);
}
/**
* Get a column from the list
*
* @param position The column to get from the list
*/
public GroupByColumn getGroupByColumn(int position) {
return get(position);
}
public void setRollup() {
rollup = true;
}
public boolean isRollup() {
return rollup;
}
/**
* Convert this object to a String. See comments in QueryTreeNode.java
* for how this should be done for tree printing.
*
* @return This object as a String
*/
public String toString() {
return super.toString();
}
}