fix(substrait): dedupe names of aggregate measures, not just grouping…#126
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apache#22453) ## Which issue does this PR close? <!-- We generally require a GitHub issue to be filed for all bug fixes and enhancements and this helps us generate change logs for our releases. You can link an issue to this PR using the GitHub syntax. For example `Closes #123` indicates that this PR will close issue #123. --> - Closes #. ## Rationale for this change When the substrait consumer hits an `Aggregate` with two identical measures (e.g. `sum(a)` present twice), planning fails with `Schema contains duplicate unqualified field name`. Substrait carries column names at the plan root rather than on the measures themselves, so the measures arrive at `Aggregate` schema construction without aliases -- and two identical exprs produce two identical field names. PR apache#20539 fixed the `NameTracker` to dedupe duplicate names in the consumer, but it was only applied to grouping expressions, not to the measures. The planner sees: ``` field 1: (qualifier: None, name: "sum(data.a)") field 2: (qualifier: None, name: "sum(data.a)") ``` which is rejected when constructing the Aggregate's output schema. ## What changes are included in this PR? Run aggregate measures through the same `NameTracker` like the grouping expressions in `from_aggregate_rel` ## Are these changes tested? Yes -- added a roundtrip test `aggregate_identical_measures`. Without the fix it produces `Error: SchemaError(DuplicateUnqualifiedField { name: "sum(data.a)" }, Some(""))` ## Are there any user-facing changes? No. (cherry picked from commit 097efae)
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fred1268
approved these changes
May 22, 2026
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Cherry picks apache#22453