Exploration of the working principle of mabits

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="org.sg.ombss.dal.dao.TranslateDataDao">
    <insert id="writeDataToDataBase"> 
        INSERT INTO JS_69KT.biz_idx_name (IDX_CODE, BIZ_CODE, IDX_NAME) 
        SELECT IDX_CODE,BIZ_CODE,IDX_NAME FROM OMBSS.OMBSS_BIZ_IDX
    </insert>
</mapper>

What do mabits do in the process of accessing the database across users and doing the corresponding operations?
Occupy the pit first and then change......