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https://issues.apache.org/jira/browse/SPARK-19799?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-19799:
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Assignee: (was: Apache Spark)
> Support WITH clause in subqueries
> ---------------------------------
>
> Key: SPARK-19799
> URL: https://issues.apache.org/jira/browse/SPARK-19799
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.2.0
> Reporter: Giambattista
> Priority: Major
>
> 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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