/*
* Copyright 2004-2013 H2 Group. Multiple-Licensed under the H2 License,
* Version 1.0, and under the Eclipse Public License, Version 1.0
* (http://h2database.com/html/license.html).
* Initial Developer: H2 Group
*/
package org.lealone.command.ddl;
import org.lealone.command.CommandInterface;
import org.lealone.constant.ErrorCode;
import org.lealone.dbobject.FunctionAlias;
import org.lealone.dbobject.Schema;
import org.lealone.engine.Database;
import org.lealone.engine.Session;
import org.lealone.message.DbException;
/**
* This class represents the statement
* DROP ALIAS
*/
public class DropFunctionAlias extends SchemaCommand {
private String aliasName;
private boolean ifExists;
public DropFunctionAlias(Session session, Schema schema) {
super(session, schema);
}
public int update() {
session.getUser().checkAdmin();
session.commit(true);
Database db = session.getDatabase();
FunctionAlias functionAlias = getSchema().findFunction(aliasName);
if (functionAlias == null) {
if (!ifExists) {
throw DbException.get(ErrorCode.FUNCTION_ALIAS_NOT_FOUND_1, aliasName);
}
} else {
db.removeSchemaObject(session, functionAlias);
}
return 0;
}
public void setAliasName(String name) {
this.aliasName = name;
}
public void setIfExists(boolean ifExists) {
this.ifExists = ifExists;
}
public int getType() {
return CommandInterface.DROP_ALIAS;
}
}