Trino embedded rows lose their column names

[ilsaloving]

Bug description

I am using Trino to connect to Opensearch since Superset doesn't directly support it yet.
When I do a query that contains embedded rows, superset does not display the headers for those rows, showing only "NULL".

I opened a ticket with Trino and they said it has to do with how Superset is calling the API.

trinodb/trino#23758

Screenshots/recordings

Superset version

master / latest-dev

Python version

I don't know

Node version

16

Browser

Chrome

Additional context

Actually using 4.0.2 because I haven't been having difficulties trying to extend the docker image.

Logs did not indicate any errors.

Checklist

• I have searched Superset docs and Slack and didn't find a solution to my problem.
• I have searched the GitHub issue tracker and didn't find a similar bug report.
• I have checked Superset's logs for errors and if I found a relevant Python stacktrace, I included it here as text in the "additional context" section.

[hashhar]

For more context, we (trino python client maintainers) had been unable to find a standard way to expose field names for structural types (ROW in Trino's case, similar to STRUCT in BigQuery for example) so we implemented something in trinodb/trino-python-client#335.

Superset can use those methods to retrieve the field names for nested types. Note that we don't use a dict to represent row types because the semantics are different and some valid ROW values cannot be represented as a dict and round-trip and equality becomes problematic so we are not open to changing that decision.