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.statement;
19
20 import org.apache.shardingsphere.infra.database.core.type.DatabaseType;
21 import org.apache.shardingsphere.infra.spi.type.typed.TypedSPILoader;
22 import org.apache.shardingsphere.sql.parser.api.ASTNode;
23
24 import java.util.Collection;
25 import java.util.Collections;
26
27 /**
28 * SQL statement.
29 */
30 public interface SQLStatement extends ASTNode {
31
32 /**
33 * Get count of parameters.
34 *
35 * @return count of parameters
36 */
37 int getParameterCount();
38
39 /**
40 * Get database type.
41 *
42 * @return database type
43 */
44 default DatabaseType getDatabaseType() {
45 return TypedSPILoader.getService(DatabaseType.class, "SQL92");
46 }
47
48 /**
49 * Get variable names.
50 *
51 * @return variable names
52 */
53 default Collection<String> getVariableNames() {
54 return Collections.emptyList();
55 }
56 }