Re: UNION index use help

That's exactly it - thanks, works perfectly now!

For the record, it's 8.0.3

Dmitri

> -----Original Message-----
> From: Tom Lane [mailto:tgl(at)sss(dot)pgh(dot)pa(dot)us]
> Sent: Thursday, October 06, 2005 12:32 PM
> To: Dmitri Bichko
> Cc: pgsql-sql(at)postgresql(dot)org
> Subject: Re: [SQL] UNION index use help
>
>
> "Dmitri Bichko" <dbichko(at)aveopharma(dot)com> writes:
> > Ok, I'm thoroughly confused.
>
> You didn't say which PG version you are using, but if it's
> something reasonably recent then it should be able to push
> upper qual conditions down into a UNION. I think you are
> getting bit by this restriction:
>
> * 3. For subqueries using UNION/UNION
> ALL/INTERSECT/INTERSECT ALL, we can
> * push quals into each component query, but the quals can
> only reference
> * subquery columns that suffer no type coercions in the set
> operation.
> * Otherwise there are possible semantic gotchas.
>
> You're getting burnt because you're unioning a text with a
> varchar. Make the column types the same and it'll work better.
>
> regards, tom lane
>
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