wangshuo128 opened a new pull request, #12464:
URL: https://github.com/apache/doris/pull/12464
# Proposed changes
First step of #12303
## Problem summary
This is the first step for supporting rollup index selection for
aggregate/unique key OLAP table.
This PR aims to select rollup index when the aggregate node is present and
the aggregate function matches the value type. So pre-aggregation is turned on
by default. Cases that pre-aggregation should be turned off will be addressed
in the next PR.
Main steps for rollup index selection:
1. filter rollup indexes with all the required columns.
2. filter rollup indexes that match the key prefix most.
3. order the rollup indexes by row count, column count, rollup index id.
TODO remaining:
1. address cases that pre-aggregation should be turned off. (next PR)
2. add more test cases.
## Checklist(Required)
1. Does it affect the original behavior:
- [ ] Yes
- [ ] No
- [ ] I don't know
5. Has unit tests been added:
- [ ] Yes
- [ ] No
- [ ] No Need
6. Has document been added or modified:
- [ ] Yes
- [ ] No
- [ ] No Need
7. Does it need to update dependencies:
- [ ] Yes
- [ ] No
8. Are there any changes that cannot be rolled back:
- [ ] Yes (If Yes, please explain WHY)
- [ ] 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...
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