uchenily opened a new pull request, #55442:
URL: https://github.com/apache/doris/pull/55442
### What problem does this PR solve?
This pull request standardizes the return type of all vector distance
functions to float across the codebase, ensuring consistency and improving
performance for vector similarity search operations.
Related PR: #54276
### Release note
None
### Check List (For Author)
- Test <!-- At least one of them must be included. -->
- [x] Regression test
- [x] 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.
- [x] Yes. <!-- Explain the behavior change -->
The array type in the distance function parameter cannot contain null
values, otherwise a runtime error will occur.
If the sum of squares of x or y in cosine_distance is 0, in this case,
return distance 2 directly to avoid division by zero.
- 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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