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Posted to reviews@spark.apache.org by "wankunde (via GitHub)" <gi...@apache.org> on 2023/12/03 02:03:28 UTC
[PR] [SPARK-43228][SQL] Join keys also match PartitioningCollection in CoalesceBucketsInJoin [spark]
wankunde opened a new pull request, #44128:
URL: https://github.com/apache/spark/pull/44128
### What changes were proposed in this pull request?
This PR updates `CoalesceBucketsInJoin.satisfiesOutputPartitioning` to support matching `PartitioningCollection`. A common case is that we add an alias on the join key. For example:
```sql
SELECT *
FROM (SELECT /*+ BROADCAST(t3) */ t1.i AS t1i, t1.j AS t1j, t3.*
FROM t1 JOIN t3 ON t1.i = t3.i AND t1.j = t3.j) t
JOIN t2 ON t.t1i = t2.i AND t.t1j = t2.j
```
The left side outputPartitioning is:
```
(hashpartitioning(t1i#41, t1j#42, 8) or hashpartitioning(i#46, t1j#42, 8) or hashpartitioning(t1i#41, j#47, 8) or hashpartitioning(i#46, j#47, 8))
```
### Why are the changes needed?
Enhance `CoalesceBucketsInJoin` to support more cases.
### Does this PR introduce _any_ user-facing change?
No.
### How was this patch tested?
Unit test.
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Re: [PR] [SPARK-43228][SQL] Join keys also match PartitioningCollection in CoalesceBucketsInJoin [spark]
Posted by "wangyum (via GitHub)" <gi...@apache.org>.
wangyum commented on PR #44128:
URL: https://github.com/apache/spark/pull/44128#issuecomment-1837343886
Thanks. Merged to master.
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Re: [PR] [SPARK-43228][SQL] Join keys also match PartitioningCollection in CoalesceBucketsInJoin [spark]
Posted by "wangyum (via GitHub)" <gi...@apache.org>.
wangyum closed pull request #44128: [SPARK-43228][SQL] Join keys also match PartitioningCollection in CoalesceBucketsInJoin
URL: https://github.com/apache/spark/pull/44128
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