Mryange opened a new pull request, #68627:
URL: https://github.com/apache/doris/pull/68627
`to_iso8601(TIMESTAMPTZ)` derived the timezone sign from the hour component
using integer division, so negative sub-hour offsets such as `-00:30` were
emitted as `+00:30`. The formatter also could not preserve historical offsets
containing seconds. Add a shared buffer-based formatter to `TimestampTzValue`,
reuse it for `to_string`, TIMESTAMPTZ string casts, and `to_iso8601`, and
preserve both the correct sign and offset seconds without per-row temporary
strings in the vectorized ISO formatter.
### 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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