Possibility to extract isoyear and isoweekday (or weekday) from a timestamp column.

[kajen3]

Is your feature request related to a problem?

No response

What is the motivation behind your request?

I'm working on a POC to migrate from pandas to ibis. Since pandas (and also duckdb) support this, it would be great if this is possible with ibis as well.

Describe the solution you'd like

Add new methods that expose the functionality.

What version of ibis are you running?

8.0.0

What backend(s) are you using, if any?

DuckDB

Code of Conduct

• [X] I agree to follow this project's Code of Conduct

[cpcloud]

Thanks for the issue! Seems like a nice addition.

[kaijennissen]

I don't quiet understand all of the internals, but from what I understand this should add the isoweekday functionality. However I do not understand what day_of_week in (ibis/expr/types/temporal.py) currently is supposed to do.

[cpcloud]

I commented on the PR (https://github.com/ibis-project/ibis/pull/9003#issuecomment-2064032794). Let's continue the discussion over there.