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/*-
* ========================LICENSE_START=================================
* flyway-mysql
* ========================================================================
* Copyright (C) 2010 - 2024 Red Gate Software Ltd
* ========================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* =========================LICENSE_END==================================
*/
package org.flywaydb.database.mysql;
import org.flywaydb.core.internal.database.base.Schema;
import org.flywaydb.core.internal.database.base.Table;
import org.flywaydb.core.internal.jdbc.JdbcTemplate;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
public class MySQLSchema extends Schema {
MySQLSchema(JdbcTemplate jdbcTemplate, MySQLDatabase database, String name) {
super(jdbcTemplate, database, name);
}
@Override
protected boolean doExists() throws SQLException {
return jdbcTemplate.queryForInt("SELECT COUNT(1) FROM information_schema.schemata WHERE schema_name=? LIMIT 1", name) > 0;
}
@Override
protected boolean doEmpty() throws SQLException {
List params = new ArrayList<>(Arrays.asList(name, name, name, name, name));
if (database.eventSchedulerQueryable) {
params.add(name);
}
return jdbcTemplate.queryForInt("SELECT SUM(found) FROM ("
+ "(SELECT 1 as found FROM information_schema.tables WHERE table_schema=?) UNION ALL "
+ "(SELECT 1 as found FROM information_schema.views WHERE table_schema=? LIMIT 1) UNION ALL "
+ "(SELECT 1 as found FROM information_schema.table_constraints WHERE table_schema=? LIMIT 1) UNION ALL "
+ "(SELECT 1 as found FROM information_schema.triggers WHERE event_object_schema=? LIMIT 1) UNION ALL "
+ "(SELECT 1 as found FROM information_schema.routines WHERE routine_schema=? LIMIT 1)"
// #2410 Unlike MySQL, MariaDB 10.0 and newer don't allow the events table to be queried
// when the event scheduled is DISABLED or in some rare cases OFF
+ (database.eventSchedulerQueryable ? " UNION ALL (SELECT 1 as found FROM information_schema.events WHERE event_schema=? LIMIT 1)" : "")
+ ") as all_found",
params.toArray(new String[0])
) == 0;
}
@Override
protected void doCreate() throws SQLException {
jdbcTemplate.execute("CREATE SCHEMA " + database.quote(name));
}
@Override
protected void doDrop() throws SQLException {
jdbcTemplate.execute("DROP SCHEMA " + database.quote(name));
}
@Override
protected void doClean() throws SQLException {
if (database.eventSchedulerQueryable) {
for (String statement : cleanEvents()) {
jdbcTemplate.execute(statement);
}
}
for (String statement : cleanRoutines()) {
jdbcTemplate.execute(statement);
}
for (String statement : cleanViews()) {
jdbcTemplate.execute(statement);
}
jdbcTemplate.execute("SET FOREIGN_KEY_CHECKS = 0");
for (Table table : allTables()) {
table.drop();
}
jdbcTemplate.execute("SET FOREIGN_KEY_CHECKS = 1");
// MariaDB 10.3 and newer only
for (String statement : cleanSequences()) {
jdbcTemplate.execute(statement);
}
}
private List cleanEvents() throws SQLException {
List eventNames =
jdbcTemplate.queryForStringList(
"SELECT event_name FROM information_schema.events WHERE event_schema=?",
name);
List statements = new ArrayList<>();
for (String eventName : eventNames) {
statements.add("DROP EVENT " + database.quote(name, eventName));
}
return statements;
}
private List cleanRoutines() throws SQLException {
List> routineNames =
jdbcTemplate.queryForList(
"SELECT routine_name as 'N', routine_type as 'T' FROM information_schema.routines WHERE routine_schema=?",
name);
List statements = new ArrayList<>();
for (Map row : routineNames) {
String routineName = row.get("N");
String routineType = row.get("T");
statements.add("DROP " + routineType + " " + database.quote(name, routineName));
}
return statements;
}
private List cleanViews() throws SQLException {
List viewNames =
jdbcTemplate.queryForStringList(
"SELECT table_name FROM information_schema.views WHERE table_schema=?", name);
List statements = new ArrayList<>();
for (String viewName : viewNames) {
statements.add("DROP VIEW " + database.quote(name, viewName));
}
return statements;
}
private List cleanSequences() throws SQLException {
List names =
jdbcTemplate.queryForStringList(
"SELECT table_name FROM information_schema.tables WHERE table_schema=?" +
" AND table_type='SEQUENCE'", name);
List statements = new ArrayList<>();
for (String name : names) {
statements.add("DROP SEQUENCE " + database.quote(this.name, name));
}
return statements;
}
@Override
protected MySQLTable[] doAllTables() throws SQLException {
List tableNames = jdbcTemplate.queryForStringList(
"SELECT table_name FROM information_schema.tables WHERE table_schema=?" +
" AND table_type IN ('BASE TABLE', 'SYSTEM VERSIONED')", name);
MySQLTable[] tables = new MySQLTable[tableNames.size()];
for (int i = 0; i < tableNames.size(); i++) {
tables[i] = new MySQLTable(jdbcTemplate, database, this, tableNames.get(i));
}
return tables;
}
@Override
public Table getTable(String tableName) {
return new MySQLTable(jdbcTemplate, database, this, tableName);
}
}
