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Commit773fbb1

Browse files
author
Alexander Korotkov
committed
BETWEEN support for hash partitioning.
1 parentbb060d7 commit773fbb1

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1 file changed

+121
-15
lines changed

1 file changed

+121
-15
lines changed

‎pg_pathman.c

Lines changed: 121 additions & 15 deletions
Original file line numberDiff line numberDiff line change
@@ -59,8 +59,10 @@ typedef struct
5959
typedefstruct
6060
{
6161
constPartRelationInfo*prel;
62-
Datumleast;
63-
Datumgreatest;
62+
boolhasLeast,
63+
hasGreatest;
64+
Datumleast,
65+
greatest;
6466
}WalkerContext;
6567

6668
boolpg_pathman_enable;
@@ -94,6 +96,9 @@ bool inheritance_disabled;
9496

9597
/* Expression tree handlers */
9698
staticWrapperNode*walk_expr_tree(Expr*expr,WalkerContext*context);
99+
staticvoidfinish_least_greatest(WrapperNode*wrap,WalkerContext*context);
100+
staticDatumincrease_hashable_value(constPartRelationInfo*prel,Datumvalue);
101+
staticDatumdecrease_hashable_value(constPartRelationInfo*prel,Datumvalue);
97102
staticintmake_hash(constPartRelationInfo*prel,intvalue);
98103
staticvoidhandle_binary_opexpr(WalkerContext*context,WrapperNode*result,constVar*v,constConst*c);
99104
staticWrapperNode*handle_opexpr(constOpExpr*expr,WalkerContext*context);
@@ -392,7 +397,10 @@ handle_modification_query(Query *parse)
392397

393398
/* Parse syntax tree and extract partition ranges */
394399
context.prel=prel;
400+
context.hasLeast= false;
401+
context.hasGreatest= false;
395402
wrap=walk_expr_tree(expr,&context);
403+
finish_least_greatest(wrap,&context);
396404
ranges=irange_list_intersect(ranges,wrap->rangeset);
397405

398406
/* If only one partition is affected then substitute parent table with partition */
@@ -457,13 +465,14 @@ pathman_set_rel_pathlist_hook(PlannerInfo *root, RelOptInfo *rel, Index rti, Ran
457465

458466
if (prel!=NULL&&found)
459467
{
460-
ListCell*lc;
461-
inti;
462-
Oid*dsm_arr;
463-
List*ranges,
464-
*wrappers;
465-
PathKey*pathkeyAsc=NULL,
466-
*pathkeyDesc=NULL;
468+
ListCell*lc;
469+
inti;
470+
Oid*dsm_arr;
471+
List*ranges,
472+
*wrappers;
473+
PathKey*pathkeyAsc=NULL,
474+
*pathkeyDesc=NULL;
475+
WalkerContextcontext;
467476

468477
if (prel->parttype==PT_RANGE)
469478
{
@@ -503,16 +512,18 @@ pathman_set_rel_pathlist_hook(PlannerInfo *root, RelOptInfo *rel, Index rti, Ran
503512
ranges=list_make1_int(make_irange(0,prel->children_count-1, false));
504513

505514
/* Make wrappers over restrictions and collect final rangeset */
515+
context.prel=prel;
516+
context.hasLeast= false;
517+
context.hasGreatest= false;
506518
wrappers=NIL;
507519
foreach(lc,rel->baserestrictinfo)
508520
{
509521
WrapperNode*wrap;
510-
WalkerContextcontext;
511-
512-
RestrictInfo*rinfo= (RestrictInfo*)lfirst(lc);
522+
RestrictInfo*rinfo= (RestrictInfo*)lfirst(lc);
513523

514-
context.prel=prel;
515524
wrap=walk_expr_tree(rinfo->clause,&context);
525+
if (!lc->next)
526+
finish_least_greatest(wrap,&context);
516527
wrappers=lappend(wrappers,wrap);
517528
ranges=irange_list_intersect(ranges,wrap->rangeset);
518529
}
@@ -984,6 +995,74 @@ walk_expr_tree(Expr *expr, WalkerContext *context)
984995
}
985996
}
986997

998+
staticvoid
999+
finish_least_greatest(WrapperNode*wrap,WalkerContext*context)
1000+
{
1001+
if (context->hasLeast&&context->hasGreatest)
1002+
{
1003+
switch (context->prel->atttype)
1004+
{
1005+
caseINT4OID:
1006+
{
1007+
intleast=DatumGetInt32(context->least),
1008+
greatest=DatumGetInt32(context->greatest);
1009+
List*rangeset=NIL;
1010+
1011+
if (greatest-least+1<context->prel->children_count)
1012+
{
1013+
intvalue,
1014+
hash;
1015+
for (value=least;value <=greatest;value++)
1016+
{
1017+
hash=make_hash(context->prel,value);
1018+
rangeset=irange_list_union(rangeset,
1019+
list_make1_irange(make_irange(hash,hash, true)));
1020+
}
1021+
}
1022+
wrap->rangeset=irange_list_intersect(wrap->rangeset,
1023+
rangeset);
1024+
}
1025+
break;
1026+
default:
1027+
elog(ERROR,"Invalid datatype: %u",context->prel->atttype);
1028+
}
1029+
}
1030+
context->hasLeast= false;
1031+
context->hasGreatest= false;
1032+
}
1033+
1034+
/*
1035+
* Increase value of hash partitioned column.
1036+
*/
1037+
staticDatum
1038+
increase_hashable_value(constPartRelationInfo*prel,Datumvalue)
1039+
{
1040+
switch (prel->atttype)
1041+
{
1042+
caseINT4OID:
1043+
returnInt32GetDatum(DatumGetInt32(value)+1);
1044+
default:
1045+
elog(ERROR,"Invalid datatype: %u",prel->atttype);
1046+
return (Datum)0;
1047+
}
1048+
}
1049+
1050+
/*
1051+
* Decrease value of hash partitioned column.
1052+
*/
1053+
staticDatum
1054+
decrease_hashable_value(constPartRelationInfo*prel,Datumvalue)
1055+
{
1056+
switch (prel->atttype)
1057+
{
1058+
caseINT4OID:
1059+
returnInt32GetDatum(DatumGetInt32(value)-1);
1060+
default:
1061+
elog(ERROR,"Invalid datatype: %u",prel->atttype);
1062+
return (Datum)0;
1063+
}
1064+
}
1065+
9871066
/*
9881067
*This function determines which partitions should appear in query plan
9891068
*/
@@ -1018,7 +1097,33 @@ handle_binary_opexpr(WalkerContext *context, WrapperNode *result,
10181097
switch (prel->parttype)
10191098
{
10201099
casePT_HASH:
1021-
if (strategy==BTEqualStrategyNumber)
1100+
if (strategy==BTLessStrategyNumber||
1101+
strategy==BTLessEqualStrategyNumber)
1102+
{
1103+
Datumvalue=c->constvalue;
1104+
1105+
if (strategy==BTLessStrategyNumber)
1106+
value=decrease_hashable_value(prel,value);
1107+
if (!context->hasGreatest||DatumGetInt32(FunctionCall2(&cmp_func,value,context->greatest))<0)
1108+
{
1109+
context->greatest=value;
1110+
context->hasGreatest= true;
1111+
}
1112+
}
1113+
elseif (strategy==BTGreaterStrategyNumber||
1114+
strategy==BTGreaterEqualStrategyNumber)
1115+
{
1116+
Datumvalue=c->constvalue;
1117+
1118+
if (strategy==BTGreaterStrategyNumber)
1119+
value=increase_hashable_value(prel,value);
1120+
if (!context->hasLeast||DatumGetInt32(FunctionCall2(&cmp_func,value,context->least))>0)
1121+
{
1122+
context->least=value;
1123+
context->hasLeast= true;
1124+
}
1125+
}
1126+
elseif (strategy==BTEqualStrategyNumber)
10221127
{
10231128
int_value=DatumGetInt32(c->constvalue);
10241129
key.hash=make_hash(prel,int_value);
@@ -1309,9 +1414,10 @@ handle_boolexpr(const BoolExpr *expr, WalkerContext *context)
13091414

13101415
arg=walk_expr_tree((Expr*)lfirst(lc),context);
13111416
result->args=lappend(result->args,arg);
1312-
switch(expr->boolop)
1417+
switch(expr->boolop)
13131418
{
13141419
caseOR_EXPR:
1420+
finish_least_greatest(arg,context);
13151421
result->rangeset=irange_list_union(result->rangeset,arg->rangeset);
13161422
break;
13171423
caseAND_EXPR:

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