Re: Evaluate arguments of correlated SubPlans in the referencing ExprState

Is this patch still being worked on?

On 07.03.23 01:51, Tom Lane wrote:
> Andres Freund <andres@anarazel.de> writes:
>> On 2023-03-03 15:09:18 -0500, Tom Lane wrote:
>>> It'd be good to have a header comment for ExecInitExprRec documenting
>>> the arguments, particularly that resv/resnull are where to put the
>>> subplan's eventual result.
> 
>> Did you mean ExecInitSubPlanExpr()?
> 
> Right, copy-and-pasteo, sorry.
> 
>>> You could avoid having to assume ExprState's resvalue/resnull being
>>> safe to use by instead using the target resv/resnull.  This would
>>> require putting those into the EEOP_PARAM_SET step so that
>>> ExecEvalParamSet knows where to fetch from, so maybe it's not an
>>> improvement, but perhaps worth considering.
> 
>> I think that'd be a bit worse - we'd have more pointers that can't be handled
>> in a generic way in JIT.
> 
> OK.
> 
>             regards, tom lane
> 
>