fix(db): tighten aggregate value types - #1862
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Included review availability: Your plan provides up to 8 included reviews per hour; 5 remain after this review. 📝 WalkthroughWalkthroughThe aggregate helpers now enforce numeric or orderable input domains at compile time. Numeric aggregates return ChangesAggregate type contracts
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Actionable comments posted: 1
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Inline comments:
In `@packages/db/src/query/builder/functions.ts`:
- Around line 670-672: Update the aggregate wrapper overloads around avg and the
corresponding sum/min overloads to reject wrappers whose extracted domain is
only null, applying the same non-null domain validation used by
AggregateArgument overloads. Add `@ts-expect-error` type coverage for both
RefProxy<null> and RefLeaf<null> inputs, while preserving valid nullable
numeric/orderable aggregate behavior.
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🎯 Changes
sumandavgconsistently produce numeric result typesanybehaviorThe aggregate helpers shared one return-type helper. Historical additions of
Dateand string support formin/maxtherefore also widenedsum/avg, allowing types such assum(stringRef) -> Aggregate<string>even though the runtime produces a number. The same broad fallback accepted inputs such as booleans and Temporal-like objects without a supported runtime ordering contract.This is a type-only correction. Emitted runtime JavaScript is unchanged.
Historical boundaries:
Dateand string remain supported specifically formin/max, matching PRs feat: add support for dates to max and min functions. #428 and Add string support to min/max operators #1120.max()aggregate returnsNaNwhen used with Temporal-based Date fields #665 / fix(db): support Temporal objects in min/max aggregates #1255.Validation:
@tanstack/dbpackage typecheck@tanstack/dbbuild and declaration generation✅ Checklist
pnpm test.🚀 Release Impact