eso.query_instrument; limit output to specific columns

Hello,

I am exploring the data in the ESO Archive for one instrument and want to limit the number of columns returned. I expected that if I specified columns that the ourput would be limited to the specific columns specfied. It looks like a default set of columns are also returned. e.g.

eso.ROW_LIMIT = 99
table = eso.query_instrument('vircam', columns=['prog_id'])
print(table.columns)

This is list of columns is defined as the defaults here:
eso.query_instrument('vircam', help=True)

https://astroquery.readthedocs.io/en/latest/api/astroquery.eso.EsoClass.html#astroquery.eso.EsoClass.query_instrument

has:

columns: list of strings
Columns returned by the query.

Is there a way to limit the results to only the columns that I want?

Start at the astroquery.eso.EsoClass.query_instrument entry point and reproduce the vircam example with columns=['prog_id']. Compare the documented columns argument with the returned table columns; done means a query requesting specific columns returns only those columns, with coverage for the demonstrated behavior if the repository provides a relevant test location.

Written by the indexing model from the issue text.