raulcd commented on code in PR #49658:
URL: https://github.com/apache/arrow/pull/49658#discussion_r3497857345


##########
python/pyarrow/src/arrow/python/python_to_arrow.cc:
##########
@@ -826,7 +827,7 @@ class PyDictionaryConverter<U, enable_if_has_string_view<U>>
     } else {
       ARROW_RETURN_NOT_OK(
           PyValue::Convert(this->value_type_, this->options_, value, view_));
-      return this->value_builder_->Append(view_.bytes, 
static_cast<int32_t>(view_.size));
+      return this->value_builder_->Append(std::string_view(view_.bytes, 
view_.size));

Review Comment:
   why is this necessary?



##########
cpp/src/arrow/util/converter.h:
##########
@@ -238,7 +238,9 @@ struct MakeConverterImpl {
       DICTIONARY_CASE(FloatType);
       DICTIONARY_CASE(DoubleType);
       DICTIONARY_CASE(BinaryType);
+      DICTIONARY_CASE(LargeBinaryType);

Review Comment:
   I am slightly confused because this seems to have already been added into 
main, see:
   
https://github.com/apache/arrow/blob/198423ed43d4c04dc82db1c1aa52a587944fdfdc/cpp/src/arrow/util/converter.h#L229-L244
   
   It was added on this commit three weeks ago:
   
https://github.com/apache/arrow/commit/b3ba226ef7cf43ba697aa21b671b93ede424d778



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