westonpace commented on code in PR #13032:
URL: https://github.com/apache/arrow/pull/13032#discussion_r862108441
##########
cpp/src/arrow/engine/substrait/expression_internal.cc:
##########
@@ -165,7 +165,15 @@ Result<compute::Expression> FromProto(const
substrait::Expression& expr,
ARROW_ASSIGN_OR_RAISE(arguments[i], FromProto(scalar_fn.args(i),
ext_set));
}
- return compute::call(decoded_function.name.to_string(),
std::move(arguments));
+ auto func_name = decoded_function.name.to_string();
+ if (func_name != "cast") {
+ return compute::call(func_name, std::move(arguments));
+ } else {
+ ARROW_ASSIGN_OR_RAISE(auto output_type_desc,
+ FromProto(scalar_fn.output_type(), ext_set));
+ auto cast_options = compute::CastOptions::Safe(output_type_desc.first);
+ return compute::call(func_name, std::move(arguments), cast_options);
Review Comment:
```suggestion
auto cast_options =
compute::CastOptions::Safe(std::move(output_type_desc.first));
return compute::call(func_name, std::move(arguments),
std::move(cast_options));
```
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