/*
* 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;
import com.akiban.sql.StandardException;
import com.akiban.sql.types.AliasInfo;
/**
* A DropAliasNode represents a DROP ALIAS statement.
*
*/
public class DropAliasNode extends DDLStatementNode
{
private AliasInfo.Type aliasType;
private ExistenceCheck existenceCheck;
/**
* Initializer for a DropAliasNode
*
* @param dropAliasName The name of the method alias being dropped
* @param aliasType Alias type
*
* @exception StandardException
*/
public void init(Object dropAliasName, Object aliasType, Object existenceCheck) throws StandardException {
TableName dropItem = (TableName)dropAliasName;
initAndCheck(dropItem);
this.aliasType = (AliasInfo.Type)aliasType;
this.existenceCheck = (ExistenceCheck)existenceCheck;
}
/**
* Fill this node with a deep copy of the given node.
*/
public void copyFrom(QueryTreeNode node) throws StandardException {
super.copyFrom(node);
DropAliasNode other = (DropAliasNode)node;
this.aliasType = other.aliasType;
this.existenceCheck = other.existenceCheck;
}
public AliasInfo.Type getAliasType() {
return aliasType;
}
public ExistenceCheck getExistenceCheck()
{
return existenceCheck;
}
/**
* 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() +
"existenceCheck: " + existenceCheck + "\n";
}
public String statementToString() {
return "DROP " + aliasTypeName(aliasType);
}
/* returns the alias type name given the alias char type */
private static String aliasTypeName(AliasInfo.Type type) {
String typeName = null;
switch (type) {
case PROCEDURE:
typeName = "PROCEDURE";
break;
case FUNCTION:
typeName = "FUNCTION";
break;
case SYNONYM:
typeName = "SYNONYM";
break;
case UDT:
typeName = "TYPE";
break;
}
return typeName;
}
}