Re: modifying the tbale function - Mailing list pgsql-hackers

From Joe Conway
Subject Re: modifying the tbale function
Date
Msg-id 45FEE32A.3010804@joeconway.com
Whole thread Raw
In response to Re: modifying the tbale function  (Andrew Dunstan <andrew@dunslane.net>)
List pgsql-hackers
Andrew Dunstan wrote:
> Joe Conway wrote:
>> Andrew Dunstan wrote:
>>> Are we really sure that this isn't a solution in search of a problem?
>> The need for value-per-call is real (examples mentioned down-thread) 
>> and was anticipated from day one of the SRF implementation (in fact 
>> the first patch I wrote was value-per-call, not materialize). But when 
>> we realized that value-per-call was not going to work very well for 
>> any PL *except* C-functions, we switched to SFRM_Materialize as the 
>> only supported mode, with SFRM_ValuePerCall left as a 
>> to-be-coded-later option (see SetFunctionReturnMode in execnodes.h).
>>
>> Personally I think it is worth having SFRM_ValuePerCall even if only C 
>> functions can make use of it.
> 
> Yeah, makes plenty of sense for C funcs. I don't think there's an 
> argument about that. But for that we don't need any threading 
> infrastructure.

Oh sure -- sorry I wasn't clear. I wasn't trying to support the idea of 
threading so much as the idea that value-per-call itself has merit for a 
number of use cases.

Joe



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