Re: Odd query behavior

From: Rob Sargent <robjsargent(at)gmail(dot)com>
To: pgsql-sql(at)postgresql(dot)org
Subject: Re: Odd query behavior
Date: 2010-03-12 16:06:33
Message-ID: 4B9A6689.2030904@gmail.com
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Any views involved, or separate users/roles?

On 03/12/2010 08:41 AM, Dan McFadyen wrote:
> Hello,
>
>
>
> I've come across an odd situation. I've had access to a database where a
> the following happens:
>
>
>
> " SELECT * FROM table WHERE name LIKE 'abc%' " returns 2 rows...
>
>
>
> but...
>
>
>
> " SELECT * FROM table WHERE name IN (SELECT name FROM table WHERE name
> LIKE 'abc%') " returns 0 rows...
>
>
>
> I've also tried doing a join on the column to another table that has
> what appears to be the same data, and the join comes out with zero rows.
> Weirder yet, I took the hash of both of the values and it came out
> identical.
>
>
>
> Now, I know the first thing you'll ask is if you can get a copy of the
> data to re-produce it, and the problem is, I got a copy of the data in
> question, and loaded into another server and it works fine. Both queries
> return 2 rows.
>
>
>
> I do know that server it was running on was Finnish. The database uses a
> UTF8 encoding though, so I don't know what that would make any difference.
>
>
>
> Any ideas about things I should be looking at?
>
>
>
> Thanks
>
>
>
> Dan
>
>
>
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