Re: Back-patch plpgsql fix for rowtypes with dropped columns?

On Thu, Apr 7, 2011 at 12:10 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> I'm getting some pressure at Red Hat to back-patch this fix:
> http://archives.postgresql.org/pgsql-committers/2009-08/msg00068.php
> (commit dcb2bda9b7042dbf43f876c94ebf35d951de10e9)
> into the RHEL 8.4.x postgresql release.  Since I have to do the work
> anyway, it seems to me to be sensible to commit the fix into community
> git as well, so that it will be available to everybody in future 8.4.x
> releases.  9.0 has now been out long enough that there seems no real
> risk of introducing new bugs, which was the reason for not back-patching
> at the time.
>
> The original patch modified execQual.c and some executor runtime structs
> to make use of the new tupconvert.c file.  I'm a bit inclined to reduce
> the footprint of the back-patch by not touching execQual.c, but just
> allowing there to be some duplicated code.  That would avoid any risk
> of breaking third-party code that might be looking at struct
> ConvertRowtypeExprState.
>
> I don't currently have a need to fix this before 8.4, and it looks like
> the existing patch doesn't apply easily to 8.3 anyway.  So I'm only
> proposing to do this in 8.4.
>
> Comments, objections?

Seems reasonable.  It's clearly a bug.

--
Robert Haas
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