uros-db opened a new pull request, #46722:
URL: https://github.com/apache/spark/pull/46722
<!--
Thanks for sending a pull request! Here are some tips for you:
1. If this is your first time, please read our contributor guidelines:
https://spark.apache.org/contributing.html
2. Ensure you have added or run the appropriate tests for your PR:
https://spark.apache.org/developer-tools.html
3. If the PR is unfinished, add '[WIP]' in your PR title, e.g.,
'[WIP][SPARK-XXXX] Your PR title ...'.
4. Be sure to keep the PR description updated to reflect all changes.
5. Please write your PR title to summarize what this PR proposes.
6. If possible, provide a concise example to reproduce the issue for a
faster review.
7. If you want to add a new configuration, please read the guideline first
for naming configurations in
'core/src/main/scala/org/apache/spark/internal/config/ConfigEntry.scala'.
8. If you want to add or modify an error type or message, please read the
guideline first in
'common/utils/src/main/resources/error/README.md'.
-->
### What changes were proposed in this pull request?
Enable collation support for hash join on complex types.
- Logical plan is rewritten in analysis to (recursively) replace all
non-binary strings with CollationKey
- CollationKey is a unary expression that transforms StringType to BinaryType
- Collation keys allow correct & efficient string comparison under specific
collation rules
### Why are the changes needed?
Improve JOIN performance for complex types containing collated strings.
### Does this PR introduce _any_ user-facing change?
No.
### How was this patch tested?
- Unit tests for `CollationKey` in `CollationExpressionSuite`
- E2e SQL tests for `RewriteCollationJoin` in `CollationSuite`
- Various queries with JOIN in existing TPCDS collation test suite
### Was this patch authored or co-authored using generative AI tooling?
No.
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
