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Re: use of dblink_build_sql_insert() induces a server crash

From: Joe Conway <mail(at)joeconway(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Rushabh Lathia <rushabh(dot)lathia(at)gmail(dot)com>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: use of dblink_build_sql_insert() induces a server crash
Date: 2010-02-03 19:39:14
Message-ID: 4B69D0E2.4000703@joeconway.com (view raw or flat)
Thread:
Lists: pgsql-hackers
On 02/03/2010 10:18 AM, Tom Lane wrote:
> Joe Conway <mail(at)joeconway(dot)com> writes:
>> The problem exists with all three dblink_build_sql_* functions. Here is
>> a more complete patch. If there are no objections I'll apply this to
>> HEAD and look at back-patching -- these functions have hardly been
>> touched since inception.
> 
> Do you really need to copy the relation tupdesc when you only are going
> to make a one-time check of the number of attributes?  This coding would
> make some sense if you intended to use the tupdesc again later in the
> functions, but it appears you don't.
> 
> Also, what about cases where the relation contains dropped columns ---
> it's not obvious whether this test is correct in that case.

Good input, as always. Here's another whack at it.

Thanks,

Joe

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