package com.lunhan.xxx.repository.mapper;

import com.baomidou.mybatisplus.core.toolkit.Constants;
import com.lunhan.xxx.entity.dto.search.SearchTestInfo;
import com.lunhan.xxx.repository.BasicMapper;
import com.lunhan.xxx.repository.po.TestInfoPO;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select;

@Mapper
public interface TestInfoMapper extends BasicMapper<TestInfoPO> {
    // #{param}：会进行预编译，而且进行类型匹配，最后进行变量替换，括号中可以添加映射类型如
//    @Select(
//        "<script>" +
//        "select * from student where id= #{param,javaType=int,jdbcType=NUMERIC}" +
//        "</script> "
//    )
    // ${param}：$只是只是简单的字符串拼接，要特别小心sql注入问题，对应非变量部分，只能用$。$方式一般用于传入数据库对象，比如这种group by 字段 ,order by 字段，表名，字段名等没法使用占位符的就需要使用${param}

    @Select("select * from test_info where id = #{id}")
    TestInfoPO testGet(Long id);

    @Select("select * from test_info where id = #{userName}")
    TestInfoPO testGet2(String userName);

    @Select("select * from test_info where status = #{ew.status}")
    TestInfoPO testGet3(@Param(Constants.WRAPPER) SearchTestInfo search);

    @Select("select * from test_info where status = #{search.status}")
    TestInfoPO testGet4(@Param("search") SearchTestInfo search);

}