<?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">
<!--
这个文件是自动生成的。
不要修改此文件。所有改动将在下次重新自动生成时丢失。
-->
<mapper namespace="com.ym.mec.biz.dal.dao.StudentDao">
	
	<resultMap type="com.ym.mec.biz.dal.entity.Student" id="Student">
		<result column="user_id_" property="userId" />
		<result column="subject_id_list_" property="subjectIdList" />
		<result column="create_time_" property="createTime" />
		<result column="update_time_" property="updateTime" />
	</resultMap>

	<!-- 根据主键查询一条记录 -->
	<select id="get" resultMap="Student">
		SELECT * FROM student WHERE user_id_ = #{id}
	</select>

	<!-- 全查询 -->
	<select id="findAll" resultMap="Student">
		SELECT * FROM student
	</select>

	<select id="lockUser" resultType="int">
		SELECT id_ FROM sys_user WHERE id_=#{userId} FOR UPDATE
	</select>
	
	<!-- 向数据库增加一条记录 -->
	<insert id="insert" parameterType="com.ym.mec.biz.dal.entity.Student" useGeneratedKeys="true" keyColumn="id" keyProperty="id">
		<!--
		<selectKey resultClass="int" keyProperty="id" > 
		SELECT SEQ_WSDEFINITION_ID.nextval AS ID FROM DUAL 
		</selectKey>
		-->
		INSERT INTO student (user_id_,subject_id_list_,create_time_,update_time_) VALUES(#{userId},#{subjectIdList},NOW(),NOW())
	</insert>
	
	<update id="update" parameterType="com.ym.mec.biz.dal.entity.Student">
		UPDATE student SET subject_id_list_=#{subjectIdList},update_time_=NOW() WHERE user_id_=#{userId}
	</update>
	
	<!-- 分页查询 -->
	<select id="queryPage" resultMap="Student" parameterType="map">
		SELECT * FROM student <include refid="global.limit"/>
	</select>
	
	<!-- 查询当前表的总记录数 -->
	<select id="queryCount" resultType="int">
		SELECT COUNT(*) FROM student
	</select>
</mapper>
