xiaokang opened a new pull request, #15558:
URL: https://github.com/apache/doris/pull/15558
# Proposed changes
Issue Number: close #xxx
## Problem summary
Describe your changes.
This PR optimize topn query like `SELECT * FROM tableX ORDER BY columnA
ASC/DESC LIMIT N`.
Sort node use the intermediate result of topn to generate a predicate
dynamically for the ORDER BY column, eg. columnA in the example query. Then
scan node use the predicate to filter segment file, page, rows to reduce the
data to be read dramatically.
## Checklist(Required)
1. Does it affect the original behavior:
- [ ] Yes
- [x] No
- [ ] I don't know
2. Has unit tests been added:
- [ ] Yes
- [ ] No
- [x] No Need
3. Has document been added or modified:
- [ ] Yes
- [ ] No
- [x] No Need
4. Does it need to update dependencies:
- [ ] Yes
- [x] No
5. Are there any changes that cannot be rolled back:
- [ ] Yes (If Yes, please explain WHY)
- [x] No
## Further comments
If this is a relatively large or complex change, kick off the discussion at
[d...@doris.apache.org](mailto:d...@doris.apache.org) by explaining why you
chose the solution you did and what alternatives you considered, etc...
--
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: commits-unsubscr...@doris.apache.org
For queries about this service, please contact Infrastructure at:
us...@infra.apache.org
---------------------------------------------------------------------
To unsubscribe, e-mail: commits-unsubscr...@doris.apache.org
For additional commands, e-mail: commits-h...@doris.apache.org
