shuke987 opened a new pull request, #65445:
URL: https://github.com/apache/doris/pull/65445
### What problem does this PR solve?
Issue Number: N/A
Related PR: #62265
Problem Summary:
`test_scale_num_nulls` checks that table-level `numNulls=3` is scaled to `1`
when partition pruning selects 4 of 12 rows. The regression case executes
`EXPLAIN MEMO PLAN` immediately after insert and analyze, but Cloud P0 reports
the physical partition row count asynchronously. The planner can therefore
observe a transient selected-partition row count of zero, while waiting for the
real row count can take up to two minutes.
This change:
- extracts the existing null-count scaling formula into a package-private
helper used by the production path;
- adds deterministic FE unit coverage for table row count 12,
selected-partition row count 4, and table-level `numNulls=3`;
- removes the timing-dependent Groovy regression case.
The unit test uses only fixed in-memory statistics and has no cluster,
physical row-count reporting, polling, sleep, network, or storage dependency.
Planner behavior is unchanged.
### Release note
None
### Check List (For Author)
- Test
- [ ] Regression test
- [x] Unit Test
- `StatsCalculatorTest#testScaleNumNullsForSelectedPartitions`: passed
3 consecutive runs
- `StatsCalculatorTest`: 17 tests passed
- [ ] Manual test
- [ ] No need to test or manual test
- Behavior changed:
- [x] No.
- [ ] Yes.
- Does this need documentation?
- [x] No.
- [ ] Yes.
### 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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