将Oracle分层查询转换为MariaDB

我正在将oracle查询转换为maria db。MariaDB中没有类似“开始于…连接于…”这样的分层查询。所以我不得不创建类似于“开始…”的查询，但看起来很难。你们能帮帮我吗

SELECT *
       FROM
           (SELECT T2.JOB_TYPE, 
                   T2.COMPONENT_TYPE,
                   T1.POOL_SEQ,
                   FN_GET_CODE_VALUE('componenttype',T2.COMPONENT_TYPE) AS COMPONENT_TYPE_NM,
                   MIN(T1.WORKFLOW_SEQ)WORKFLOW_SEQ,
                   MIN(T1.UPPER_WORKFLOW_SEQ)UPPER_WORKFLOW_SEQ,
                   MAX(T1.DEFAULT_JOB_SEQ)DEFAULT_JOB_SEQ,
                   T1.WORKFLOW_TYPE,
                   /*   MAX(T1.WORKFLOW_TYPE)WORKFLOW_TYPE, */
                   COUNT(CASE T1.JOB_STATE WHEN '01' THEN 1 END)STATE_01_CNT,
                   COUNT(CASE T1.JOB_STATE WHEN '02' THEN 1 END)STATE_02_CNT,
                   COUNT(CASE T1.JOB_STATE WHEN '03' THEN 1 END)STATE_03_CNT,
                   COUNT(CASE T1.JOB_RESULT WHEN '20' THEN 1 END)ERCNT,
                   COUNT(CASE T1.JOB_RESULT WHEN '10' THEN 1 END)END_CNT,
                   COUNT(*)TOT_CNT
                   /*   ,MAX(T1.POOL_SEQ)POOL_SEQ   */
              FROM JOB_TBL T1,
                   SERVER_POOL_TBL T2
             WHERE T1.POOL_SEQ =  T2.POOL_SEQ

          )T
  START WITH UPPER_WORKFLOW_SEQ IS NULL
CONNECT BY UPPER_WORKFLOW_SEQ = PRIOR WORKFLOW_SEQ

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使用

connectby

是Oracle专有的扩展，在“发明”CTE之前引入。递归CTE也更通用。

我认为Maria DB没有与

connect by

相当的功能。。尽管您可以在过程或函数中实现它。