gunshi-project-ss/src/main/java/com/gunshi/project/ss/mapper/DocCenterMapper.java

package com.gunshi.project.ss.mapper;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.gunshi.project.ss.model.DocCategory;
import com.gunshi.project.ss.model.DocCenter;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select;

import java.util.List;

@Mapper
public interface DocCenterMapper extends BaseMapper<DocCenter> {


    @Select("""
    SELECT *
    FROM (
        SELECT *,
               ROW_NUMBER() OVER (
                   PARTITION BY group_id
                   ORDER BY doc_number DESC
               ) AS rn
        FROM doc_center
        WHERE doc_category_id = #{docCategoryId}
    ) AS ranked
    WHERE rn = 1;
""")
    List<DocCenter> latestDocCenter(@Param("docCategoryId") Long docCategoryId);

}