Manlio Perillo wrote:
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> Here is the code I have:
> http://paste.pocoo.org/show/178959/
>
> What each plugin do is:
> - - add additional columns in the select list
> - - add additional where clauses or order_by clauses

I don't see how you are getting column conflicts with that recipe:

http://paste.pocoo.org/show/179031/





>
> Basically I have a simple table inheritance scheme, where each
> additional table "derive" from the `contents` table,
>
>
>> Feel free to look at its implementation and
>>> suggest what it is you're looking for.
>>
>
> I think I need to refactor that code.
> Each plugin *must not* add columns; instead the columnn to add should be
> computed using the util.folded_equivalents if tables are joined.
>
> So I think that I simply need the util.folded_equivalents function,
> thanks.
>
>
> Manlio
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