LiBinfeng-01 opened a new pull request, #46523:
URL: https://github.com/apache/doris/pull/46523
pick: #45233
Issue Number: #44666
Related PR: #40441
Problem Summary:
- select substring_index('哈哈哈AAA','A', 1); String.split function has second
parameter 'limit', which is default zero. When 'limit' is zero, it means it
would remove trailing empty strings split of '哈哈哈AAA', which would be '哈哈哈'
only. But what we expect is '哈哈哈', '','','' when part function is used by
substring index. So we should change splitpart limit to -1 to enable trailing
empty character in splitpart list
- reorganize fold constant of string functions in fe and add more cases
### What problem does this PR solve?
Issue Number: close #xxx
Related PR: #xxx
Problem Summary:
### 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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