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Commit5e1f3b9

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committed
Make Bitmapsets be valid Nodes.
Add a NodeTag field to struct Bitmapset. This is free because ofalignment considerations on 64-bit hardware. While it adds somespace on 32-bit machines, we aren't optimizing for that case anymore.The advantage is that data structures such as Lists of Bitmapsetsare now first-class objects to the Node infrastructure, and don'trequire special-case code to handle.This patch includes removal of one such special case, in indxpath.c:bms_equal_any() can now be replaced by list_member(). There may bemore existing code that could be simplified, but I didn't look veryhard. We also get to drop the read_write_ignore annotations on acouple of RelOptInfo fields.The outfuncs/readfuncs support is arranged so that nothing changesin the string representation of a Bitmapset field; therefore, thisdoesn't need a catversion bump.Amit Langote and Tom LaneDiscussion:https://postgr.es/m/109089.1668197158@sss.pgh.pa.us
1 parent9c7eb9d commit5e1f3b9

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12 files changed

+68
-30
lines changed

12 files changed

+68
-30
lines changed

‎src/backend/nodes/Makefile‎

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -52,6 +52,7 @@ node_headers = \
5252
commands/trigger.h\
5353
executor/tuptable.h\
5454
foreign/fdwapi.h\
55+
nodes/bitmapset.h\
5556
nodes/extensible.h\
5657
nodes/lockoptions.h\
5758
nodes/replnodes.h\

‎src/backend/nodes/bitmapset.c‎

Lines changed: 2 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -194,6 +194,7 @@ bms_make_singleton(int x)
194194
wordnum=WORDNUM(x);
195195
bitnum=BITNUM(x);
196196
result= (Bitmapset*)palloc0(BITMAPSET_SIZE(wordnum+1));
197+
result->type=T_Bitmapset;
197198
result->nwords=wordnum+1;
198199
result->words[wordnum]= ((bitmapword)1 <<bitnum);
199200
returnresult;
@@ -852,6 +853,7 @@ bms_add_range(Bitmapset *a, int lower, int upper)
852853
if (a==NULL)
853854
{
854855
a= (Bitmapset*)palloc0(BITMAPSET_SIZE(uwordnum+1));
856+
a->type=T_Bitmapset;
855857
a->nwords=uwordnum+1;
856858
}
857859
elseif (uwordnum >=a->nwords)

‎src/backend/nodes/copyfuncs.c‎

Lines changed: 6 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -160,6 +160,12 @@ _copyExtensibleNode(const ExtensibleNode *from)
160160
returnnewnode;
161161
}
162162

163+
staticBitmapset*
164+
_copyBitmapset(constBitmapset*from)
165+
{
166+
returnbms_copy(from);
167+
}
168+
163169

164170
/*
165171
* copyObjectImpl -- implementation of copyObject(); see nodes/nodes.h

‎src/backend/nodes/equalfuncs.c‎

Lines changed: 6 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -145,6 +145,12 @@ _equalA_Const(const A_Const *a, const A_Const *b)
145145
return true;
146146
}
147147

148+
staticbool
149+
_equalBitmapset(constBitmapset*a,constBitmapset*b)
150+
{
151+
returnbms_equal(a,b);
152+
}
153+
148154
/*
149155
* Lists are handled specially
150156
*/

‎src/backend/nodes/gen_node_support.pl‎

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -65,6 +65,7 @@ sub elem
6565
commands/trigger.h
6666
executor/tuptable.h
6767
foreign/fdwapi.h
68+
nodes/bitmapset.h
6869
nodes/extensible.h
6970
nodes/lockoptions.h
7071
nodes/replnodes.h

‎src/backend/nodes/outfuncs.c‎

Lines changed: 5 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -314,6 +314,9 @@ _outList(StringInfo str, const List *node)
314314
* converts a bitmap set of integers
315315
*
316316
* Note: the output format is "(b int int ...)", similar to an integer List.
317+
*
318+
* We export this function for use by extensions that define extensible nodes.
319+
* That's somewhat historical, though, because calling outNode() will work.
317320
*/
318321
void
319322
outBitmapset(StringInfostr,constBitmapset*bms)
@@ -844,6 +847,8 @@ outNode(StringInfo str, const void *obj)
844847
_outString(str, (String*)obj);
845848
elseif (IsA(obj,BitString))
846849
_outBitString(str, (BitString*)obj);
850+
elseif (IsA(obj,Bitmapset))
851+
outBitmapset(str, (Bitmapset*)obj);
847852
else
848853
{
849854
appendStringInfoChar(str,'{');

‎src/backend/nodes/read.c‎

Lines changed: 29 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -22,6 +22,7 @@
2222
#include<ctype.h>
2323

2424
#include"common/string.h"
25+
#include"nodes/bitmapset.h"
2526
#include"nodes/pg_list.h"
2627
#include"nodes/readfuncs.h"
2728
#include"nodes/value.h"
@@ -347,6 +348,7 @@ nodeRead(const char *token, int tok_len)
347348
* Could be an integer list:(i int int ...)
348349
* or an OID list:(o int int ...)
349350
* or an XID list:(x int int ...)
351+
* or a bitmapset:(b int int ...)
350352
* or a list of nodes/values:(node node ...)
351353
*----------
352354
*/
@@ -372,6 +374,7 @@ nodeRead(const char *token, int tok_len)
372374
tok_len,token);
373375
l=lappend_int(l,val);
374376
}
377+
result= (Node*)l;
375378
}
376379
elseif (tok_len==1&&token[0]=='o')
377380
{
@@ -392,6 +395,7 @@ nodeRead(const char *token, int tok_len)
392395
tok_len,token);
393396
l=lappend_oid(l,val);
394397
}
398+
result= (Node*)l;
395399
}
396400
elseif (tok_len==1&&token[0]=='x')
397401
{
@@ -412,6 +416,30 @@ nodeRead(const char *token, int tok_len)
412416
tok_len,token);
413417
l=lappend_xid(l,val);
414418
}
419+
result= (Node*)l;
420+
}
421+
elseif (tok_len==1&&token[0]=='b')
422+
{
423+
/* Bitmapset -- see also _readBitmapset() */
424+
Bitmapset*bms=NULL;
425+
426+
for (;;)
427+
{
428+
intval;
429+
char*endptr;
430+
431+
token=pg_strtok(&tok_len);
432+
if (token==NULL)
433+
elog(ERROR,"unterminated Bitmapset structure");
434+
if (tok_len==1&&token[0]==')')
435+
break;
436+
val= (int)strtol(token,&endptr,10);
437+
if (endptr!=token+tok_len)
438+
elog(ERROR,"unrecognized integer: \"%.*s\"",
439+
tok_len,token);
440+
bms=bms_add_member(bms,val);
441+
}
442+
result= (Node*)bms;
415443
}
416444
else
417445
{
@@ -426,8 +454,8 @@ nodeRead(const char *token, int tok_len)
426454
if (token==NULL)
427455
elog(ERROR,"unterminated List structure");
428456
}
457+
result= (Node*)l;
429458
}
430-
result= (Node*)l;
431459
break;
432460
}
433461
caseRIGHT_PAREN:

‎src/backend/nodes/readfuncs.c‎

Lines changed: 6 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -194,6 +194,10 @@ nullable_string(const char *token, int length)
194194

195195
/*
196196
* _readBitmapset
197+
*
198+
* Note: this code is used in contexts where we know that a Bitmapset
199+
* is expected. There is equivalent code in nodeRead() that can read a
200+
* Bitmapset when we come across one in other contexts.
197201
*/
198202
staticBitmapset*
199203
_readBitmapset(void)
@@ -234,7 +238,8 @@ _readBitmapset(void)
234238
}
235239

236240
/*
237-
* for use by extensions which define extensible nodes
241+
* We export this function for use by extensions that define extensible nodes.
242+
* That's somewhat historical, though, because calling nodeRead() will work.
238243
*/
239244
Bitmapset*
240245
readBitmapset(void)

‎src/backend/optimizer/path/indxpath.c‎

Lines changed: 4 additions & 24 deletions
Original file line numberDiff line numberDiff line change
@@ -99,7 +99,6 @@ static void get_join_index_paths(PlannerInfo *root, RelOptInfo *rel,
9999
List**considered_relids);
100100
staticbooleclass_already_used(EquivalenceClass*parent_ec,Relidsoldrelids,
101101
List*indexjoinclauses);
102-
staticboolbms_equal_any(Relidsrelids,List*relids_list);
103102
staticvoidget_index_paths(PlannerInfo*root,RelOptInfo*rel,
104103
IndexOptInfo*index,IndexClauseSet*clauses,
105104
List**bitindexpaths);
@@ -370,8 +369,8 @@ create_index_paths(PlannerInfo *root, RelOptInfo *rel)
370369
Path*path= (Path*)lfirst(lc);
371370
Relidsrequired_outer=PATH_REQ_OUTER(path);
372371

373-
if (!bms_equal_any(required_outer,all_path_outers))
374-
all_path_outers=lappend(all_path_outers,required_outer);
372+
all_path_outers=list_append_unique(all_path_outers,
373+
required_outer);
375374
}
376375

377376
/* Now, for each distinct parameterization set ... */
@@ -517,7 +516,7 @@ consider_index_join_outer_rels(PlannerInfo *root, RelOptInfo *rel,
517516
intnum_considered_relids;
518517

519518
/* If we already tried its relids set, no need to do so again */
520-
if (bms_equal_any(clause_relids,*considered_relids))
519+
if (list_member(*considered_relids,clause_relids))
521520
continue;
522521

523522
/*
@@ -612,7 +611,7 @@ get_join_index_paths(PlannerInfo *root, RelOptInfo *rel,
612611
intindexcol;
613612

614613
/* If we already considered this relids set, don't repeat the work */
615-
if (bms_equal_any(relids,*considered_relids))
614+
if (list_member(*considered_relids,relids))
616615
return;
617616

618617
/* Identify indexclauses usable with this relids set */
@@ -694,25 +693,6 @@ eclass_already_used(EquivalenceClass *parent_ec, Relids oldrelids,
694693
return false;
695694
}
696695

697-
/*
698-
* bms_equal_any
699-
*True if relids is bms_equal to any member of relids_list
700-
*
701-
* Perhaps this should be in bitmapset.c someday.
702-
*/
703-
staticbool
704-
bms_equal_any(Relidsrelids,List*relids_list)
705-
{
706-
ListCell*lc;
707-
708-
foreach(lc,relids_list)
709-
{
710-
if (bms_equal(relids, (Relids)lfirst(lc)))
711-
return true;
712-
}
713-
return false;
714-
}
715-
716696

717697
/*
718698
* get_index_paths

‎src/include/nodes/bitmapset.h‎

Lines changed: 5 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -20,6 +20,8 @@
2020
#ifndefBITMAPSET_H
2121
#defineBITMAPSET_H
2222

23+
#include"nodes/nodes.h"
24+
2325
/*
2426
* Forward decl to save including pg_list.h
2527
*/
@@ -48,6 +50,9 @@ typedef int32 signedbitmapword; /* must be the matching signed type */
4850

4951
typedefstructBitmapset
5052
{
53+
pg_node_attr(custom_copy_equal,special_read_write)
54+
55+
NodeTagtype;
5156
intnwords;/* number of words in array */
5257
bitmapwordwords[FLEXIBLE_ARRAY_MEMBER];/* really [nwords] */
5358
}Bitmapset;

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