add doc and export

khwilson · Oct 10, 2024 · 89f1ae9 · 89f1ae9
1 parent 2cf89fe
commit 89f1ae9
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/cpp/src/arrow/compute/kernels/codegen_internal.h b/cpp/src/arrow/compute/kernels/codegen_internal.h
@@ -1383,6 +1383,11 @@ Status CastBinaryDecimalArgs(DecimalPromotion promotion, std::vector<TypeHolder>
 ARROW_EXPORT
 Status CastDecimalArgs(TypeHolder* begin, size_t count);
 
+/// Given a DataType, if it is a DecimalType, return a DecimalType with the same scale
+/// and the maximum precision for that DecimalType.
+///
+/// If it is _not_ a DecimalType, return type
+ARROW_EXPORT
 Result<std::shared_ptr<DataType>> WidenDecimalToMaxPrecision(std::shared_ptr<DataType> type);
 
 ARROW_EXPORT