NoOperation.java

/*
 * Copyright 2014-2015 the original author or authors
 *
 * Licensed 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 com.wplatform.ddal.command.dml;

import com.wplatform.ddal.command.CommandInterface;
import com.wplatform.ddal.command.Prepared;
import com.wplatform.ddal.engine.Session;
import com.wplatform.ddal.result.ResultInterface;

/**
 * Represents an empty statement or a statement that has no effect.
 */
public class NoOperation extends Prepared {

    public NoOperation(Session session) {
        super(session);
    }

    @Override
    public int update() {
        return 0;
    }

    @Override
    public boolean isQuery() {
        return false;
    }

    @Override
    public boolean isTransactional() {
        return true;
    }

    @Override
    public boolean needRecompile() {
        return false;
    }

    @Override
    public boolean isReadOnly() {
        return true;
    }

    @Override
    public ResultInterface queryMeta() {
        return null;
    }

    @Override
    public int getType() {
        return CommandInterface.NO_OPERATION;
    }

}