On 24 June 2016 at 05:55, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> #define AGGOP_COMBINESTATES 0x1
> #define AGGOP_SERIALIZESTATES 0x2
> #define AGGOP_DESERIALIZESTATES 0x4
> #define AGGOP_FINALIZEAGGS 0x8
>
> typedef enum AggPartialMode
> {
> AGGPARTIAL_SIMPLE = AGGOP_FINALIZEAGGS,
> AGGPARTIAL_PARTIAL = AGGOP_SERIALIZESTATES,
> AGGPARTIAL_FINAL = AGGOP_COMBINESTATES | AGGOP_DESERIALIZESTATES | AGGOP_FINALIZEAGGS
> } AggPartialMode;
>
> #define DO_AGGPARTIAL_COMBINE(apm) (((apm) & AGGOP_COMBINESTATES) != 0)
> #define DO_AGGPARTIAL_SERIALIZE(apm) (((apm) & AGGOP_SERIALIZESTATES) != 0)
> #define DO_AGGPARTIAL_DESERIALIZE(apm) (((apm) & AGGOP_DESERIALIZESTATES) != 0)
> #define DO_AGGPARTIAL_FINALIZE(apm) (((apm) & AGGOP_FINALIZEAGGS) != 0)
The attached implements this, with the exception that I didn't really
think AggPartialMode was the best name for the enum. I've named this
AggregateMode instead, as the aggregate is only partial in some cases.
I also appended _SERIAL and _DESERIAL to the end of the partial and
final modes for now, as likely in 10.0 we'll be performing some
partial non-serialized aggregation and we'll likely want to keep those
other names for that instead.
--
David Rowley http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
