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.distsql.statement.rql.resource;
19
20 import lombok.Getter;
21 import lombok.RequiredArgsConstructor;
22 import org.apache.shardingsphere.sql.parser.sql.common.segment.generic.DatabaseSegment;
23 import org.apache.shardingsphere.sql.parser.sql.common.statement.available.FromDatabaseAvailable;
24
25 import java.util.Optional;
26
27 /**
28 * Show storage unit statement.
29 */
30 @Getter
31 @RequiredArgsConstructor
32 public final class ShowStorageUnitsStatement extends ResourceQueryStatement implements FromDatabaseAvailable {
33
34 private final DatabaseSegment database;
35
36 private final Integer usageCount;
37
38 @Override
39 public Optional<DatabaseSegment> getDatabase() {
40 return Optional.ofNullable(database);
41 }
42
43 /**
44 * Get usage count.
45 *
46 * @return usage count
47 */
48 public Optional<Integer> getUsageCount() {
49 return Optional.ofNullable(usageCount);
50 }
51 }