Re: BUG #1677: Bug in select with Union

On Mon, 23 May 2005 11:54 pm, Tom Lane wrote:
> "Julien Vallet" <julien(dot)vallet(at)density-tech(dot)com> writes:
> > The result is "ERROR: UNION types text and bigint cannot be matched"
>
> This is the identical issue reported here:
> http://archives.postgresql.org/pgsql-bugs/2005-02/msg00008.php
> See also this thread:
> http://archives.postgresql.org/pgsql-general/2005-02/msg00693.php
>
> The short answer is that what you wrote is illegal per the SQL spec
> (which doesn't allow NULL to be used in ways where a type can't be
> ascribed immediately). While we'd like to accept it, we have
> not figured out a rule that doesn't break the spec in other ways.
> For now I'd recommend casting the NULLs explicitly.

Can we spit out an error that is slightly more relevant? Maybe print
a warning/error that NULL was used without a type?

Regards

Russell Smith
> regards, tom lane
>
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