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Re: BUG #7550: NULL result when coercing a subquery result into an array

From: tom Tom <tom(at)tomforb(dot)es>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: pgsql-bugs(at)postgresql(dot)org
Subject: Re: BUG #7550: NULL result when coercing a subquery result into an array
Date: 2012-09-17 20:44:59
Message-ID: CAFNZOJOo7TvWmX29Qaw2+gNN7=FMiZNMgeiCpL=_OEST+FyfVQ@mail.gmail.com (view raw or flat)
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Lists: pgsql-bugs
Ok, I will try. I apologize, I made a mistake in the original post:
'J. P. Bickella' returns the correct array and 'J. P. Bickell' returns
NULL. That's what you get for posting in a hurry!

This is the first time I have run this query, so I don't know if it
affects previous versions.

~Tom

On Mon, Sep 17, 2012 at 9:38 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> tom(at)tomforb(dot)es writes:
>> I have two queries:
>> http://pgsql.privatepaste.com/7d1473defa
>> http://pgsql.privatepaste.com/85e1d43b7a
>
>> The first query returns NULL and the second one returns an int[] with 623
>> elements in it. The only difference between the two queries is the last
>> string - 'J. P. Bickella' returns NULL and 'J. P. Bickell' returns an
>> int[].
>
> That's ... bizarre.  I assume you were running this same query without
> issues on earlier PG versions?  Which?
>
>> If needed I can host the database this query is executing on for people to
>> download upon request, but it is 1.2gb in size.
>
> I suspect that you could reproduce the problem with a much smaller
> extract from the table, perhaps a couple thousand rows.  Please try
> to create a self-contained test case along those lines --- it'll be
> easier all around than dealing with 1GB of data.
>
>                         regards, tom lane


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