Github user dongjoon-hyun commented on the issue:
https://github.com/apache/spark/pull/14132
Hi, the followings are updated.
- Hints are not propagated into subqueries.
- Add new testcases
- `SELECT /*+ MAPJOIN(t1) */ * FROM t1 JOIN t1 JOIN t1 JOIN t1` (First
`t1`)
- `SELECT /*+ MAPJOIN(t1) */ * FROM (SELECT * FROM t1) x JOIN t1` (Last
`t1`)
- `SELECT /*+ MAPJOIN(t1) */ * FROM (SELECT * FROM t1) x JOIN t2`
(Ignored)
- Update GROUPING SET testcase not to use a nested query.
- Remove the testcases for broadcast nested queries.
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