Question

我正在使用IBatis和Spring框架。

我想執行多個查詢，但我無法得到響應。

<select id="getUIs" resultMap="blpUiVOMap" parameterClass="Map"> 
    SELECT 
     GROUP_CONCAT(DISTINCT 
     CONCAT('COUNT(CASE WHEN bug.BUG_STT = ', STT_ID, ' THEN 1 END) AS ''bugI', STT_ID, '''') 
    ) INTO @sql 
    from BLP_STT <![CDATA[;]]> 

    SET @sql = CONCAT('SELECT ui.UI_ID, ui.UI_NM, cat.CAT_ID, cat.CAT_NM, cat.PRNT_ID, cat1.CAT_NM as PRNT_NM,',@sql,'FROM BLP_UI ui JOIN BLP_CAT cat ON ui.CAT_ID = cat.CAT_ID JOIN BLP_CAT cat1 ON cat.PRNT_ID = cat1.CAT_ID JOIN BLP_BUG bug ON ui.UI_ID = bug.UI_ID JOIN BLP_STT stt ON bug.BUG_STT = stt.STT_ID WHERE 1 = 1 GROUP BY ui.UI_ID ORDER BY ui.UI_ID ASC') <![CDATA[;]]> 

    PREPARE stmt FROM @sql <![CDATA[;]]> 
    EXECUTE stmt <![CDATA[;]]> 
    DEALLOCATE PREPARE stmt <![CDATA[;]]> 
</select> 

在MySQL中，這個查詢工作正常。

Answer 1

<select>將在JDBC中創建一個單獨的PreparedStatement。您正試圖從MySQL命令行執行命令。這在JDBC或MyBatis中不起作用。

您將需要創建一個包含所有字符串的單個查詢。也許這樣？

SELECT ui.UI_ID, ui.UI_NM, cat.CAT_ID, cat.CAT_NM, cat.PRNT_ID, cat1.CAT_NM as PRNT_NM, 
(SELECT 
    GROUP_CONCAT(DISTINCT 
    CONCAT('COUNT(CASE WHEN bug.BUG_STT = ', STT_ID, ' THEN 1 END) AS ''bugI', STT_ID, '''') 
) 
    from BLP_STT 
) 
FROM BLP_UI ui JOIN BLP_CAT cat ON ui.CAT_ID = cat.CAT_ID JOIN BLP_CAT cat1 ON cat.PRNT_ID = cat1.CAT_ID JOIN BLP_BUG bug ON ui.UI_ID = bug.UI_ID JOIN BLP_STT stt ON bug.BUG_STT = stt.STT_ID WHERE 1 = 1 GROUP BY ui.UI_ID ORDER BY ui.UI_ID ASC') 

請注意，您也不需要在XML中添加;。