Giambattista created SPARK-19799:
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Summary: 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
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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