[Dbix-class] Excluding columns from a query

[fREW Schmidt]

Gah, I should have read this thread sooner!  I am actually working on adding
such a feature to DBIC.  Getting it to work is quite easy.  Getting the
right semantics is hard.  For instance, we've discussed this on IRC and
really there are two options:


   1. Only have the remove-columns affect the default select, since having
   it affect an explicit columns list is a little silly.
   2. Having it affect the *current* select list; the use-case for this
   would be if you had an explicit columns list in previous search (or a
   predefined search more likely) and you wanted to take away a column from
   that.

I'm personally in favor of the former, mostly because it's the simplest to
explain, test, and implement, and really all this is is a shortcut anyway.

Honestly I've implemented this twice now, both ways, but we need to nail
down the semantics.  Furthermore, I feel like implementing remove-select and
remove-as is needlessly complex.  If someone provides a select/as just blow
it away with columns.

What do you guys think?
-- =

fREW Schmidt
http://blog.afoolishmanifesto.com
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