1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 package org.apache.shardingsphere.proxy.frontend.command.executor;
19
20 import org.apache.shardingsphere.db.protocol.packet.DatabasePacket;
21
22 import java.sql.SQLException;
23
24 /**
25 * Query command executor.
26 */
27 public interface QueryCommandExecutor extends CommandExecutor {
28
29 /**
30 * Get response type.
31 *
32 * @return response type
33 */
34 ResponseType getResponseType();
35
36 /**
37 * Goto next result value.
38 *
39 * @return has more result value or not
40 * @throws SQLException SQL exception
41 */
42 boolean next() throws SQLException;
43
44 /**
45 * Get query row packet.
46 *
47 * @return database packet of query row
48 * @throws SQLException SQL exception
49 */
50 DatabasePacket getQueryRowPacket() throws SQLException;
51 }