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Do execGrouping.c via expression eval machinery.

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This has a performance benefit on own, although not hugely so. The
primary benefit is that it will allow for to JIT tuple deforming and
comparator invocations.

Author: Andres Freund
Discussion: https://postgr.es/m/20171129080934.amqqkke2zjtekd4t@alap3.anarazel.de
This commit is contained in:
Andres Freund
2018-02-15 21:55:31 -08:00
parent 51db0d18fb
commit 773aec7aa9
15 changed files with 498 additions and 366 deletions
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14
src/include/nodes/execnodes.h
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@@ -635,6 +635,8 @@ typedef struct TupleHashTableData
FmgrInfo *in_hash_funcs; /* hash functions for input datatype(s) */
FmgrInfo *cur_eq_funcs; /* equality functions for input vs. table */
uint32 hash_iv; /* hash-function IV */
ExprState *eq_func; /* tuple equality comparator */
ExprContext *exprcontext; /* expression context */
} TupleHashTableData;
typedef tuplehash_iterator TupleHashIterator;
@@ -781,6 +783,7 @@ typedef struct SubPlanState
HeapTuple curTuple; /* copy of most recent tuple from subplan */
Datum curArray; /* most recent array from ARRAY() subplan */
/* these are used when hashing the subselect's output: */
TupleDesc descRight; /* subselect desc after projection */
ProjectionInfo *projLeft; /* for projecting lefthand exprs */
ProjectionInfo *projRight; /* for projecting subselect output */
TupleHashTable hashtable; /* hash table for no-nulls subselect rows */
@@ -1795,7 +1798,7 @@ typedef struct SortState
typedef struct GroupState
{
ScanState ss; /* its first field is NodeTag */
FmgrInfo *eqfunctions; /* per-field lookup data for equality fns */
ExprState *eqfunction; /* equality function */
bool grp_done; /* indicates completion of Group scan */
} GroupState;
@@ -1885,8 +1888,8 @@ typedef struct WindowAggState
WindowStatePerFunc perfunc; /* per-window-function information */
WindowStatePerAgg peragg; /* per-plain-aggregate information */
FmgrInfo *partEqfunctions; /* equality funcs for partition columns */
FmgrInfo *ordEqfunctions; /* equality funcs for ordering columns */
ExprState *partEqfunction; /* equality funcs for partition columns */
ExprState *ordEqfunction; /* equality funcs for ordering columns */
Tuplestorestate *buffer; /* stores rows of current partition */
int current_ptr; /* read pointer # for current row */
int framehead_ptr; /* read pointer # for frame head, if used */
@@ -1964,8 +1967,7 @@ typedef struct WindowAggState
typedef struct UniqueState
{
PlanState ps; /* its first field is NodeTag */
FmgrInfo *eqfunctions; /* per-field lookup data for equality fns */
MemoryContext tempContext; /* short-term context for comparisons */
ExprState *eqfunction; /* tuple equality qual */
} UniqueState;
/* ----------------
@@ -2079,11 +2081,11 @@ typedef struct SetOpStatePerGroupData *SetOpStatePerGroup;
typedef struct SetOpState
{
PlanState ps; /* its first field is NodeTag */
ExprState *eqfunction; /* equality comparator */
FmgrInfo *eqfunctions; /* per-grouping-field equality fns */
FmgrInfo *hashfunctions; /* per-grouping-field hash fns */
bool setop_done; /* indicates completion of output scan */
long numOutput; /* number of dups left to output */
MemoryContext tempContext; /* short-term context for comparisons */
/* these fields are used in SETOP_SORTED mode: */
SetOpStatePerGroup pergroup; /* per-group working state */
HeapTuple grp_firstTuple; /* copy of first tuple of current group */