Tom Lane wrote: > What I'm imagining is, say, > > #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) > > > These enum constants satisfy the properties I mentioned before, but their > assigned values are chosen to make the macros cheap.
Ah, sure, that makes sense. -- Álvaro Herrera http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers