yujun777 opened a new pull request, #49982:
URL: https://github.com/apache/doris/pull/49982
### What problem does this PR solve?
support constant propagation, for example: `a = 10 and a + b > 30` will
rewrite to `a = 10 and 10 + b > 30`,
when processing a plan, it will collect all its children's equal sets and
constants uniforms,
then use them and the plan's expressions to infer more equal sets and
constants uniforms,
finally use the combine uniforms to replace this plan's expression's slot
with literals.
TODO:
1) process with LogicalRepeat;
2) add more test, include agg, join, subquery, and logical repeat;
### Check List (For Author)
- Test <!-- At least one of them must be included. -->
- [ ] Regression test
- [ ] Unit Test
- [ ] Manual test (add detailed scripts or steps below)
- [ ] No need to test or manual test. Explain why:
- [ ] This is a refactor/code format and no logic has been changed.
- [ ] Previous test can cover this change.
- [ ] No code files have been changed.
- [ ] Other reason <!-- Add your reason? -->
- Behavior changed:
- [ ] No.
- [ ] Yes. <!-- Explain the behavior change -->
- Does this need documentation?
- [ ] No.
- [ ] Yes. <!-- Add document PR link here. eg:
https://github.com/apache/doris-website/pull/1214 -->
### Check List (For Reviewer who merge this PR)
- [ ] Confirm the release note
- [ ] Confirm test cases
- [ ] Confirm document
- [ ] Add branch pick label <!-- Add branch pick label that this PR should
merge into -->
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