Re: [HACKERS] Re: [INTERFACES] retrieving varchar size

>
>
>
> Bruce Momjian wrote:
>
> > > The problem with that theory is this. If the frontend application just
> > > executes some random query, such as "select * from table", you really do not
> > > know anything about what is coming back. You must rely on the little bit of
> > > information the protocol gives you. In the case of Postgres, it gives you
> > > the fieldname, datatype, and size for each column in the result.
> > > Unfortunately, for varchar and char(n), the size reports -1. This is not
> > > very helpful for describing the result set.
> > >
> > > Your above example works fine (in fact we use that already) when you know the
> > > table and column name, as in metadata functions such as SQLColumns() in the
> > > ODBC driver.
> >
> > Yep. We could pass back atttypmod as part of the PGresult. I can add
> > that to the TODO list. Would that help?
>
> Yes, that would do it!
>
> Thank you for listening to our ravings on this issue.

Added to TODO:

* Add pg_attribute.atttypmod/Resdom->restypmod to PGresult structure

This is a good suggestion.

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