【MyBatis】实现in操作符在WHERE 子句中规定多个值

Mapper.xml中写：

    <select id="selectIdsByDate"  resultType="java.lang.Long">
        select id from emp where cdate&lt;#{date,jdbcType=TIMESTAMP} limit 10000
    </select>

    <delete id="deleteByIds">
        delete from emp where id in
        <foreach collection="list" open="(" close=")" separator="," item="id" index="i">
            #{id}
        </foreach>
    </delete>

接口中这样写：

    List<Long> selectIdsByDate(String date);

    int deleteByIds(List<Long> ids);

代码中则这样用：

            EmpMapper mapper=session.getMapper(EmpMapper.class);

            int totalChanged=0;
            int index=0;
            while(true) {
                List<Long> ids=mapper.selectIdsByDate("2018-02-02");
                if(ids.size()==0) {
                    break;
                }

                int changed=mapper.deleteByIds(ids);
                System.out.println("#"+index+" deleted="+changed);
                session.commit();
                totalChanged+=changed;

                index++;
            }

--END-- 2019年10月14日09:30:52