/
DatabaseStatement.java
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/
DatabaseStatement.java
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.lealone.sql.ddl;
import org.lealone.common.exceptions.DbException;
import org.lealone.db.Database;
import org.lealone.db.LealoneDatabase;
import org.lealone.db.ServerSession;
import org.lealone.db.api.ErrorCode;
import org.lealone.net.NetEndpoint;
import org.lealone.sql.router.SQLRouter;
public abstract class DatabaseStatement extends DefineStatement {
protected DatabaseStatement(ServerSession session) {
super(session);
}
@Override
public boolean isDatabaseStatement() {
return true;
}
protected void checkRight() {
checkRight(null);
}
protected void checkRight(Integer errorCode) {
// 只有用管理员连接到LealoneDatabase才能执行CREATE/ALTER/DROP DATABASE语句
if (!(LealoneDatabase.getInstance() == session.getDatabase() && session.getUser().isAdmin())) {
if (errorCode != null)
throw DbException.get(errorCode.intValue());
else
throw DbException.get(ErrorCode.GENERAL_ERROR_1,
"create/alter/drop database only allowed for the super user");
}
}
protected boolean isTargetEndpoint(Database db) {
NetEndpoint localEndpoint = NetEndpoint.getLocalTcpEndpoint();
return db.isTargetEndpoint(localEndpoint);
}
protected void executeDatabaseStatement(Database db) {
if (session.isRoot() && !this.isLocal()) {
SQLRouter.executeDatabaseStatement(db, session, this);
}
}
}