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From "Dongjoon Hyun (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (SPARK-19799) Support WITH clause in subqueries
Date Thu, 04 Jul 2019 14:36:00 GMT

     [ https://issues.apache.org/jira/browse/SPARK-19799?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Dongjoon Hyun resolved SPARK-19799.
-----------------------------------
       Resolution: Fixed
    Fix Version/s: 3.0.0

This is resolved via https://github.com/apache/spark/pull/24831

> Support WITH clause in subqueries
> ---------------------------------
>
>                 Key: SPARK-19799
>                 URL: https://issues.apache.org/jira/browse/SPARK-19799
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SQL
>    Affects Versions: 2.2.0
>            Reporter: Giambattista
>            Assignee: Peter Toth
>            Priority: Major
>             Fix For: 3.0.0
>
>
> Because of Spark-17590 it should be relatively easy to support WITH clause in subqueries
besides nested CTE definitions.
> Here an example of a query that does not run on spark:
> create table test (seqno int, k string, v int) using parquet;
> insert into TABLE test values (1,'a', 99),(2, 'b', 88),(3, 'a', 77),(4, 'b', 66),(5,
'c', 55),(6, 'a', 44),(7, 'b', 33);
> SELECT percentile(b, 0.5) FROM (WITH mavg AS (SELECT k, AVG(v) OVER (PARTITION BY k ORDER
BY seqno ROWS BETWEEN 3 PRECEDING AND CURRENT ROW) as b FROM test ORDER BY seqno) SELECT k,
MAX(b) as b  FROM mavg GROUP BY k);



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