Horton

Re: BUG #17994: Invalidating relcache corrupts tupDesc inside ExecEvalFieldStoreDeForm()

Andrew Dunstan <andrew@dunslane.net>

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From: Andrew Dunstan <andrew@dunslane.net>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Andres Freund <andres@anarazel.de>, exclusion@gmail.com, pgsql-bugs@lists.postgresql.org
Date: 2023-06-30T18:43:20Z
Lists: pgsql-bugs 
On 2023-06-30 Fr 09:43, Tom Lane wrote:
> Andrew Dunstan<andrew@dunslane.net>  writes:
>> OK, I get it. Do we have a routine to wrap a Datum in a bytea, or do I
>> need to write one?
> I don't recall that functionality being exported anywhere,
> but it'd only be a couple lines of code in any case.
>
> (Whether it's actually worth doing, I'm not sure about.
> It only helps if it lets you use existing hashtable support
> routines, but I'm not quite sure that any of those exist
> for bytea either.)
>
> 			


Me either. I think this might call for too much invention so I'm going 
to revert to plan A. The invalidation code won't be very much, and it 
should be a fairly rare event, so it doesn't need to be very clever.


cheers


andrew

--
Andrew Dunstan
EDB:https://www.enterprisedb.com

Commits

  1. Cache by-reference missing values in a long lived context

  2. Fix order of operations in ExecEvalFieldStoreDeForm().