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.sql.parser.sql.common.segment.dml.pagination.top;
19
20 import lombok.Getter;
21 import lombok.RequiredArgsConstructor;
22 import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.item.ProjectionSegment;
23 import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.pagination.rownum.RowNumberValueSegment;
24
25 /**
26 * Top projection segment.
27 */
28 @RequiredArgsConstructor
29 @Getter
30 public final class TopProjectionSegment implements ProjectionSegment {
31
32 private final int startIndex;
33
34 private final int stopIndex;
35
36 private final RowNumberValueSegment top;
37
38 private final String alias;
39
40 @Override
41 public String getColumnLabel() {
42 // TODO return column label according to database result
43 return "TOP";
44 }
45 }