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减少nodeagg算子初始化转移函数的次数，减少算子nodeagg的投影次数

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Signed-off-by: 夏自豪 <xiazihao3@huawei.com>
This commit is contained in:
夏自豪
2023-02-25 08:19:45 +00:00
committed by x30033890
parent 2114241085
commit 1b8ab5a2e2
3 changed files with 117 additions and 69 deletions
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26
src/include/executor/node/nodeAgg.h
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@ -79,7 +79,8 @@ typedef struct AggStatePerAggData {
/* number of inputs including ORDER BY expressions */
int numInputs;
/* offset of input columns in AggState->evalslot */
int inputoff;
bool is_avg;
/*
@ -151,19 +152,19 @@ typedef struct AggStatePerAggData {
bool inputtypeByVal, resulttypeByVal, transtypeByVal;
/*
* Stuff for evaluation of inputs. We used to just use ExecEvalExpr, but
* with the addition of ORDER BY we now need at least a slot for passing
* data to the sort object, which requires a tupledesc, so we might as
* well go whole hog and use ExecProject too.
* Stuff for evaluation of aggregate inputs in cases where the aggregate
* requires sorted input. The arguments themselves will be evaluated via
* AggState->evalslot/evalproj for all aggregates at once, but we only
* want to sort the relevant columns for individual aggregates.
*/
TupleDesc evaldesc; /* descriptor of input tuples */
ProjectionInfo* evalproj; /* projection machinery */
TupleDesc sortdesc; /* descriptor of input tuples */
/*
* Slots for holding the evaluated input arguments. These are set up
* during ExecInitAgg() and then used for each input row.
* during ExecInitAgg() and then used for each input row requiring
* procesessing besides what's done in AggState->evalproj.
*/
TupleTableSlot* evalslot; /* current input tuple */
TupleTableSlot *sortslot; /* current input tuple */
TupleTableSlot* uniqslot; /* used for multi-column DISTINCT */
/*
@ -185,9 +186,14 @@ typedef struct AggStatePerAggData {
* This field is a pre-initialized FunctionCallInfo struct used for
* calling this aggregate's transfn. We save a few cycles per row by not
* re-initializing the unchanging fields; which isn't much, but it seems
* worth the extra space consumption.
* worth the extra space consumption. cached for transhfn and collectfn now.
*/
FunctionCallInfoData transfn_fcinfo;
/* XXX: use for vector engine now, better remove later*/
TupleDesc evaldesc; /* descriptor of input tuples */
ProjectionInfo *evalproj; /* projection machinery */
TupleTableSlot *evalslot; /* current input tuple */
} AggStatePerAggData;
/*