技術標籤：Javamysql

Mysql版本導致GROUP BY分組異常

一、異常資訊

Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column ‘ecpnew.m.id’ which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

二、資料庫版本

版本 1

版本 2（出事版本）

三、SQL

        select count(m.material_name)  realSorageNumber  ,m.*
        from tb_material_inventory   m
        left join
        tb_catalog c  on  m.catalog_buss_key =  c.buss_key
        where  m.catalog_buss_key  in (
                SELECT
                    buss_key
                FROM
                    (
 

                SELECT
                    @ids AS _ids,
                    ( SELECT @ids := GROUP_CONCAT( id ) FROM tb_catalog WHERE FIND_IN_SET( parent_id, @ids ) ) AS cids,
                    @l := @l + 1 AS LEVEL
                FROM
                    tb_catalog,
                    ( SELECT
 
 @ids := #{catalogId}, @l := 0 ) b
                WHERE
                    @ids IS NOT NULL
                    ) id,
                    tb_catalog DATA
                WHERE
                    FIND_IN_SET( DATA.id, _ids )
                ORDER BY
                    LEVEL,id
        )
        and m.warehouse_buss_key = #{bussKey}
        GROUP BY m.catalog_buss_key

該處使用的url網路請求的資料。

四、解決方案

1、修改Mysql配置檔案（不建議採用）

原配置檔案

select @@global.sql_mode;
結果：ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION

修改配置（將ONLY_FULL_GROUP_BY去掉）

set @@global.sql_mode ='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION';

2、修改SQL

MySQL也提供了any_value()函式來抑制ONLY_FULL_GROUP_BY值被拒絕

    <select id="selectMaterialByRoot" resultType="com.luke.admin.entity.vo.MaterialInventoryVO">
        select count(m.material_name)  realSorageNumber  , <include refid="anyValue"/>
        from tb_material_inventory   m
        left join
        tb_catalog c  on  m.catalog_buss_key =  c.buss_key
        where  m.catalog_buss_key  in (
                SELECT
                    buss_key
                FROM
                    (
                SELECT
                    @ids AS _ids,
                    ( SELECT @ids := GROUP_CONCAT( id ) FROM tb_catalog WHERE FIND_IN_SET( parent_id, @ids ) ) AS cids,
                    @l := @l + 1 AS LEVEL
                FROM
                    tb_catalog,
                    ( SELECT @ids := #{catalogId}, @l := 0 ) b
                WHERE
                    @ids IS NOT NULL
                    ) id,
                    tb_catalog DATA
                WHERE
                    FIND_IN_SET( DATA.id, _ids )
                ORDER BY
                    LEVEL,id
        )
        and m.warehouse_buss_key = #{bussKey}
        GROUP BY m.catalog_buss_key
    </select>
    <sql id="anyValue">
        any_value(m.id) as id ,
        any_value(m.material_name) as material_name ,
        any_value(m.catalog_buss_key) as catalog_buss_key,
        any_value(m.catalog_name) as catalog_name,
        any_value(m.rfid) as rfid,
        any_value(m.warehouse_buss_key) as warehouse_buss_key,
        any_value(m.warehouse_name) as warehouse_name,
        any_value(m.manufacture_date) as manufacture_date,
        any_value(m.expiration_date) as expiration_date,
        any_value(m.model) as model,
        any_value(m.storage_number) as storage_number,
        any_value(m.reason_name) as reason_name,
        any_value(m.storage_location) as storage_location,
        any_value(m.specifications) as specifications,
        any_value(m.material_img) as material_img,
        any_value(m.material_type) as material_type,
        any_value(m.factory_id) as factory_id,
        any_value(m.factory_name) as factory_name,
        any_value(m.material_state) as material_state,
        any_value(m.batch) as batch,
        any_value(m.company) as company,
        any_value(m.create_time) as create_time,
        any_value(m.update_time) as update_time,
        any_value(m.description) as description
    </sql>

五、總結

mysql5.7.x版本，預設是開啟了 only_full_group_by 模式的，但開啟這個模式後，原先的 group by 語句就報錯，關閉這個模式是不可取的。MySQL 5.7.5和up實現了對功能依賴的檢測。如果啟用了only_full_group_by SQL模式(在預設情況下是這樣)，那麼MySQL就會拒絕選擇列表、條件或順序列表引用的查詢，這些查詢將引用組中未命名的非聚合列，而不是在功能上依賴於它們。