xylaaaaa opened a new pull request, #64686:
URL: https://github.com/apache/doris/pull/64686
### What problem does this PR solve?
Issue Number: N/A
Related PR: #60993
Problem Summary:
- Nested complex type schema change validation currently supports varchar
length growth and safe numeric promotions, but rejects decimal precision
promotion.
- This PR allows nested decimal precision widening when scale is unchanged,
for example `array<decimal(5,2)>` to `array<decimal(10,2)>`.
- The same validation path covers array item types, map key/value types, and
struct fields.
### Release note
Support nested decimal precision promotion in Iceberg schema change
validation.
### Check List (For Author)
- Test <!-- At least one of them must be included. -->
- [ ] 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. Nested decimal precision widening with unchanged scale is now
allowed in complex type schema change validation.
- Does this need documentation?
- [x] 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 -->
### Test
```bash
MAVEN_OPTS='-Xmx2g -XX:ActiveProcessorCount=2' mvn -pl fe-core -am
-DfailIfNoTests=false -Dtest=ColumnTest test
```
Result: `Tests run: 14, Failures: 0, Errors: 0`, `BUILD SUCCESS`.
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