3 * Copyright (C) 2009-2019 SonarSource SA
4 * mailto:info AT sonarsource DOT com
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 3 of the License, or (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public License
17 * along with this program; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
20 package org.sonar.server.platform.db.migration.sql;
22 import java.util.List;
23 import org.sonar.db.dialect.Dialect;
24 import org.sonar.db.dialect.H2;
25 import org.sonar.db.dialect.MsSql;
26 import org.sonar.db.dialect.MySql;
27 import org.sonar.db.dialect.Oracle;
28 import org.sonar.db.dialect.PostgreSql;
30 import static java.util.Collections.singletonList;
31 import static org.sonar.server.platform.db.migration.def.Validations.validateIndexName;
32 import static org.sonar.server.platform.db.migration.def.Validations.validateTableName;
34 public class DropIndexBuilder {
36 private final Dialect dialect;
37 private String tableName;
38 private String indexName;
40 public DropIndexBuilder(Dialect dialect) {
41 this.dialect = dialect;
44 public DropIndexBuilder setTable(String s) {
49 public DropIndexBuilder setName(String s) {
54 public List<String> build() {
55 validateTableName(tableName);
56 validateIndexName(indexName);
57 return singletonList(createSqlStatement());
60 private String createSqlStatement() {
61 switch (dialect.getId()) {
64 return "DROP INDEX " + indexName + " ON " + tableName;
66 return "DROP INDEX " + indexName;
69 return "DROP INDEX IF EXISTS " + indexName;
71 throw new IllegalStateException("Unsupported dialect for drop of index: " + dialect);