pitrou commented on a change in pull request #7612:
URL: https://github.com/apache/arrow/pull/7612#discussion_r449258150
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File path: cpp/src/arrow/compute/kernels/scalar_cast_numeric.cc
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@@ -467,6 +467,51 @@ struct CastFunctor<Decimal128Type, Decimal128Type> {
}
};
+// ----------------------------------------------------------------------
+// Real to decimal
+
+template <bool AllowTruncate>
+struct RealToDecimal {
+ template <typename OUT, typename RealType>
+ Decimal128 Call(KernelContext* ctx, RealType val) const {
+ auto result = Decimal128::FromReal(val, out_precision_, out_scale_);
+ if (ARROW_PREDICT_FALSE(!result.ok())) {
+ if (!AllowTruncate) {
+ ctx->SetStatus(result.status());
+ }
+ return Decimal128(); // Zero
+ } else {
+ return *std::move(result);
+ }
+ }
+
+ int32_t out_scale_, out_precision_;
+};
+
+using SafeRealToDecimal = RealToDecimal<true>;
+using UnsafeRealToDecimal = RealToDecimal<false>;
Review comment:
Hum, yes, sounds fine. I initially thought the code would be more
different, but it doesn't really make sense to generate two codepaths now.
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