SWQXDBA c61ff5865c fix: toMany join性能优化
@RelationOneToMany和@RelationManyToMany的实现存在严重的性能问题。内存join算法的复杂度高达n^2
测试sql脚本init中设置编码格式避免中文乱码
2024-02-28 17:47:40 +08:00

49 lines
1.7 KiB
Java

/*
* Copyright (c) 2022-2023, Mybatis-Flex (fuhai999@gmail.com).
* <p>
* 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
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* 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.
*/
package com.mybatisflex.test;
import com.mybatisflex.core.MybatisFlexBootstrap;
import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseBuilder;
import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType;
import javax.sql.DataSource;
import java.util.List;
public class MaskManagerTest {
public static void main(String[] args) {
DataSource dataSource = new EmbeddedDatabaseBuilder()
.setType(EmbeddedDatabaseType.H2)
.setName("db1")
.addScript("schema.sql")
.addScript("data.sql").setScriptEncoding("UTF-8")
.build();
MybatisFlexBootstrap.getInstance()
.setDataSource(dataSource)
.addMapper(AccountMapper.class)
.start();
//获取 mapper
AccountMapper mapper = MybatisFlexBootstrap.getInstance().getMapper(AccountMapper.class);
List<Account> accounts = mapper.selectAll();
// List<Account> accounts = MaskManager.withoutMask(mapper::selectAll);
System.out.println(accounts);
}
}