lidavidm commented on code in PR #13737:
URL: https://github.com/apache/arrow/pull/13737#discussion_r932436063
##########
cpp/src/arrow/scalar.cc:
##########
@@ -1041,6 +1041,24 @@ Status CastImpl(const StructScalar& from, StringScalar*
to) {
return Status::OK();
}
+// list based types (list, large list and map (fixed sized list too)) to string
+Status CastImpl(const BaseListScalar& from, StringScalar* to) {
+ std::stringstream ss;
+ ss << from.type->ToString() << "{";
+ for (int64_t i = 0; i < from.value->length(); i++) {
+ if (i > 0) ss << ", ";
+ auto result = from.value->GetScalar(i);
+ if (!result.ok()) {
+ return(result.status());
+ } else {
+ ss << result.ValueOrDie()->ToString();
+ }
Review Comment:
```suggestion
ARROW_ASSIGN_OR_RAISE(auto value, from.value->GetScalar(i));
ss << value->ToString();
```
##########
cpp/src/arrow/scalar.cc:
##########
@@ -1041,6 +1041,24 @@ Status CastImpl(const StructScalar& from, StringScalar*
to) {
return Status::OK();
}
+// list based types (list, large list and map (fixed sized list too)) to string
+Status CastImpl(const BaseListScalar& from, StringScalar* to) {
+ std::stringstream ss;
+ ss << from.type->ToString() << "{";
Review Comment:
kind of a nit, but maybe square brackets are preferable here?
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