morrySnow opened a new pull request, #68071:
URL: https://github.com/apache/doris/pull/68071
### What problem does this PR solve?
Related PRs: #64881, #65319
Problem Summary:
Backport the two related constant-folding fixes to branch-4.1 in one PR.
They align FE folding with BE execution for affected string, URL,
floating-point, date/time, decimal, and `str_to_date` expressions.
Both changes are kept together because #65319 follows up on #64881,
including the correct `FIELD` behavior for signed zero while preserving the
existing `NaN` match behavior. The string regression assertions are moved from
master's `test_string_all` suite into the corresponding `test_string_function`
suite used by branch-4.1.
### Release note
Fix incorrect FE constant-folded results for the affected expressions.
### Check List (For Author)
- Test
- [x] Unit Test
- [x] Regression test coverage included
- Behavior changed:
- [x] Yes. FE constant folding now matches BE execution for the covered
expressions.
- Does this need documentation?
- [x] No.
Test details:
- Targeted FE unit tests: 29 run, 0 failures, 0 errors, 2 pre-existing skips.
- Full FE Maven reactor: `BUILD SUCCESS`.
### Check List (For Reviewer who merge this PR)
- [ ] Confirm the release note
- [ ] Confirm test cases
- [ ] Confirm document
- [ ] Add branch pick label
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