Spark SQL中的递归CTE [英] recursive cte in spark SQL

问题描述

; WITH  Hierarchy as 
        (
            select distinct PersonnelNumber
            , Email
            , ManagerEmail 
            from dimstage
            union all
            select e.PersonnelNumber
            , e.Email           
            , e.ManagerEmail 
            from dimstage  e
            join Hierarchy as  h on e.Email = h.ManagerEmail
        )
        select * from Hierarchy

您能在SPARK SQL中实现同样的效果吗?

Can you help acheive the same in SPARK SQL

推荐答案

使用SPARK SQL不可能做到这一点.存在WITH子句，但不支持CONNECT BY，例如ORACLE或DB2中的递归.

This is not possible using SPARK SQL. The WITH clause exists, but not for CONNECT BY like in, say, ORACLE, or recursion in DB2.

这篇关于Spark SQL中的递归CTE的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！