csun5285 opened a new pull request, #64273:
URL: https://github.com/apache/doris/pull/64273
…
A heterogeneous array such as {"a": ["1", 2, 1.1]} (string + int + double)
stored in a VARIANT sparse column was reconstructed with a wrong element type:
DataTypeArraySerDe::deserialize_binary_to_field set the array element type to
the last non-null element's type instead of the least common (JSONB-aware)
supertype. For the example it yielded array<double> and dropped the string
element, which then crashed during AGGREGATE merge re-insertion with:
[E-7412]Field::get type mismatch: requested DOUBLE, actual STRING
Fix:
- Compute the array element type as get_least_supertype_jsonb over all
element types (so mixed string + numeric resolves to JSONB), and mark the field
as needing conversion when the elements are heterogeneous.
- Propagate FieldInfo::need_convert through FieldWithDataType so the
conversion flag survives the sparse read path (FieldInfo -> FieldWithDataType
-> FieldInfo); otherwise the field is inserted into the column without
converting elements to the common type.
The crash is only reachable when a variant subcolumn budget forces the path
to be materialized (e.g. fuzzy default_variant_max_subcolumns_count=1); the
original test aborted earlier on a separate non-deterministic whitespace
difference in the variant-to-string projection, so the AGGREGATE crash was
latent.
Also stabilize the regression case: project the variant via cast(v as json),
whose canonical compact output is independent of whether the subcolumn is
materialized as a typed array or kept as sparse JSONB, removing the flaky
whitespace mismatch.
### 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
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