Added to TODO:
* Improve reporting of UNION type mismatches
http://archives.postgresql.org/pgsql-hackers/2007-04/msg00944.php
http://archives.postgresql.org/pgsql-hackers/2008-03/msg00597.php
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Peter Eisentraut wrote:
> So I was informed today that UNION types integer and text cannot be
> matched. Alright, but it failed to tell which particular expressions
> in this 3-branch, 30-columns-each UNION clause in a 100-line statement
> it was talking about. So I made the attached patch to give some better
> pointers. Example:
>
> peter=# values(0,1), (1::bigint,2), ('text'::text,3);
> ERROR: 42804: VALUES types bigint at position 2 and text at position 3
> cannot be matched in instance 1
>
> I'm not sure about the terminology "position" and "instance"; they're
> just two coordinates to get at the problem.
>
> None of this will help if you have multiple unrelated clauses that
> invoke select_common_type(), but that might be better handled using the
> parser location mechanism.
>
> Comments?
>
> --
> Peter Eisentraut
> http://developer.postgresql.org/~petere/
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-- Bruce Momjian <bruce@momjian.us> http://momjian.us EnterpriseDB
http://postgres.enterprisedb.com
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