/* * 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; } }