Re: Virtual generated columns

On 07.11.24 11:02, Dean Rasheed wrote:
> On Tue, 5 Nov 2024 at 16:17, Peter Eisentraut <peter(at)eisentraut(dot)org> wrote:
>>
>> New patch version.
>
> In expand_generated_columns_in_expr():
>
> + /*
> + * XXX For the benefit of triggers, make two passes, so it covers
> + * PRS2_OLD_VARNO and PRS2_NEW_VARNO.
> + */
> + node = expand_generated_columns_internal(node, rel, 1, rte);
> + node = expand_generated_columns_internal(node, rel, 2, rte);
>
> It seems a bit messy to be doing these two passes in
> expand_generated_columns_in_expr(), when it is only needed for
> triggers. I think it was better the way it was in the v7 patch,
> passing rt_index to expand_generated_columns_in_expr(), so that
> TriggerEnabled() did this:
>
> + tgqual = (Node *)
> expand_generated_columns_in_expr(tgqual, relinfo->ri_RelationDesc,
> PRS2_OLD_VARNO);
> + tgqual = (Node *)
> expand_generated_columns_in_expr(tgqual, relinfo->ri_RelationDesc,
> PRS2_NEW_VARNO);

Yeah, I put it back that way in v9.