Matthijs Brobbel

It would be helpful to have Fletchgen output warnings for unused metadata fields that start with `fletcher_`. For example, (this happened to me) when someone adds `fletchgen_epc` to Schema metadata...

Add test with nullable field to demonstrate Fletchgen issue

2

This reproduces the issue encountered by Mengfei when using nullable fields. It breaks the sum example when modified to have a nullable field. This PR should not be merged but...

Close #813.

It would be good to setup tests that run the `text` parsers against the extensions in https://github.com/substrait-io/substrait/tree/main/extensions.

Tracking issue for `parse` module

4

This is a tracking issue for a `parse` module in the Substrait crate. Some requirements of Substrait can not be expressed via Protobuf definition or schema files. A `parse` module...