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GH-48740: [C++] Add missing CTypeTraits for decimal types #48763

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GH-48740: [C++] Add missing CTypeTraits for decimal types #48763

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GH-48740: [C++] Add missing CTypeTraits for decimal types
Jan 7, 2026
33a4ff3
Fix linting whitespace
Jan 8, 2026
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12 changes: 12 additions & 0 deletions cpp/src/arrow/type_traits.h
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Original file line number Diff line number Diff line change
Expand Up @@ -135,6 +135,18 @@ struct CTypeTraits<bool> : public TypeTraits<BooleanType> {
using ArrowType = BooleanType;
};

template <>
struct CTypeTraits<Decimal128Type> {
using ArrowType = Decimal128Type;
using CType = Decimal128;
};

template <>
struct CTypeTraits<Decimal256Type> {
using ArrowType = Decimal256Type;
using CType = Decimal256;
};

#define PRIMITIVE_TYPE_TRAITS_DEF_(CType_, ArrowType_, ArrowArrayType, ArrowBuilderType, \
ArrowScalarType, ArrowTensorType, SingletonFn) \
template <> \
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