yujun777 opened a new pull request, #45310:
URL: https://github.com/apache/doris/pull/45310
### What problem does this PR solve?
Issue Number: close #xxx
Related PR: #xxx
Problem Summary:
for sql
```
a > 10 and a < 20 or a > 30 and a < 40 or a > 60 and a < 50
```
AddMinMax should opt it as:
```
(a < 20 or a > 30 or a is null and null) and a > 10 and a < 40
```
But if fail, because the SimplifyRange will opt it as
```
a > 10 and a < 20 or a > 30 and a < 40 or a is null and null
```
since the 3rd is 'a is null and null', it couldn't get a's range and
suppose a's range is [-00, +00], then the whole expression, it will get a's
range is [-00, +00], to fix this problem, RangeInference need to convert a is
null and null to EmptyValue, but not an UnknownValue.
### Release note
None
### 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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