diff options
Diffstat (limited to 'src/include/nodes/nodes.h')
| -rw-r--r-- | src/include/nodes/nodes.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/src/include/nodes/nodes.h b/src/include/nodes/nodes.h index 8f46091fd9b..6b850e4bc4e 100644 --- a/src/include/nodes/nodes.h +++ b/src/include/nodes/nodes.h @@ -695,6 +695,36 @@ typedef enum AggStrategy } AggStrategy; /* + * AggSplit - + * splitting (partial aggregation) modes for Agg plan nodes + * + * This is needed in both plannodes.h and relation.h, so put it here... + */ + +/* Primitive options supported by nodeAgg.c: */ +#define AGGSPLITOP_COMBINE 0x01 /* substitute combinefn for transfn */ +#define AGGSPLITOP_SKIPFINAL 0x02 /* skip finalfn, return state as-is */ +#define AGGSPLITOP_SERIALIZE 0x04 /* apply serializefn to output */ +#define AGGSPLITOP_DESERIALIZE 0x08 /* apply deserializefn to input */ + +/* Supported operating modes (i.e., useful combinations of these options): */ +typedef enum AggSplit +{ + /* Basic, non-split aggregation: */ + AGGSPLIT_SIMPLE = 0, + /* Initial phase of partial aggregation, with serialization: */ + AGGSPLIT_INITIAL_SERIAL = AGGSPLITOP_SKIPFINAL | AGGSPLITOP_SERIALIZE, + /* Final phase of partial aggregation, with deserialization: */ + AGGSPLIT_FINAL_DESERIAL = AGGSPLITOP_COMBINE | AGGSPLITOP_DESERIALIZE +} AggSplit; + +/* Test whether an AggSplit value selects each primitive option: */ +#define DO_AGGSPLIT_COMBINE(as) (((as) & AGGSPLITOP_COMBINE) != 0) +#define DO_AGGSPLIT_SKIPFINAL(as) (((as) & AGGSPLITOP_SKIPFINAL) != 0) +#define DO_AGGSPLIT_SERIALIZE(as) (((as) & AGGSPLITOP_SERIALIZE) != 0) +#define DO_AGGSPLIT_DESERIALIZE(as) (((as) & AGGSPLITOP_DESERIALIZE) != 0) + +/* * SetOpCmd and SetOpStrategy - * overall semantics and execution strategies for SetOp plan nodes * |