jacktengg opened a new pull request, #67909:
URL: https://github.com/apache/doris/pull/67909
Issue Number: None
Related PR: None
Problem Summary: Commit 23c83f48bceae6578b55dcfe9cae476b9c15fc8a added
TIMESTAMP_NS with 9 fractional digits, but TIMEV2 was capped at scale 6 and
time functions converted values through integral microseconds. This truncated
submicrosecond results such as TIMEDIFF(TIMESTAMP_NS, TIMESTAMP_NS). Extend
TIMEV2 to scale 9 while retaining its existing double microsecond-unit
representation, and preserve exact nanoseconds in differences, conversions,
formatting, constant folding, external TIME readers, arithmetic, and binary
query results.
TIMEV2 supports scales up to 9, and time results such as TIMEDIFF on
TIMESTAMP_NS preserve nanosecond precision.
- Test: Unit Test and Regression Test
- ASAN BE and FE builds passed
- 26 targeted BE unit tests passed
- 108 targeted FE unit tests passed
- Relevant timestamp_ns, TIME function, scalar function, binary
protocol, and documentation regression suites passed
- Behavior changed: Yes (TIMEV2 supports nanosecond precision)
- Does this need documentation: No
### 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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