flink-libraries/flink-sql-client/src/main/java/org/apache/flink/table/client/gateway/local/result/ChangelogResult.java

/*
 * 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.apache.flink.table.client.gateway.local.result;

import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.table.client.gateway.TypedResult;
import org.apache.flink.types.Row;

import java.util.List;

/**
 * A result that is represented as a changelog consisting of insert and delete records.
 *
 * @param <C> cluster id to which this result belongs to
 */
public interface ChangelogResult<C> extends DynamicResult<C> {

	/**
	 * Retrieves the available result records.
	 */
	TypedResult<List<Tuple2<Boolean, Row>>> retrieveChanges();
}