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Commit462bb7f

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Remove bms_first_member().
This function has been semi-deprecated ever since we inventedbms_next_member(). Its habit of scribbling on the input bitmapsetisn't great, plus for sufficiently large bitmapsets it would takeO(N^2) time to complete a loop. Now we have the additional problemthat reducing the input to empty while leaving it still accessiblewould violate a planned invariant. So let's just get rid of it,after updating the few extant callers to use bms_next_member().Patch by me; thanks to Nathan Bossart and Richard Guo for review.Discussion:https://postgr.es/m/1159933.1677621588@sss.pgh.pa.us
1 parent2f80c95 commit462bb7f

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9 files changed

+23
-70
lines changed

9 files changed

+23
-70
lines changed

‎contrib/file_fdw/file_fdw.c

Lines changed: 5 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -858,7 +858,7 @@ check_selective_binary_conversion(RelOptInfo *baserel,
858858
ListCell*lc;
859859
Relationrel;
860860
TupleDesctupleDesc;
861-
AttrNumberattnum;
861+
intattidx;
862862
Bitmapset*attrs_used=NULL;
863863
boolhas_wholerow= false;
864864
intnumattrs;
@@ -901,10 +901,11 @@ check_selective_binary_conversion(RelOptInfo *baserel,
901901
rel=table_open(foreigntableid,AccessShareLock);
902902
tupleDesc=RelationGetDescr(rel);
903903

904-
while ((attnum=bms_first_member(attrs_used)) >=0)
904+
attidx=-1;
905+
while ((attidx=bms_next_member(attrs_used,attidx)) >=0)
905906
{
906-
/*Adjust for system attributes. */
907-
attnum+=FirstLowInvalidHeapAttributeNumber;
907+
/*attidx is zero-based, attnum is the normal attribute number */
908+
AttrNumberattnum=attidx+FirstLowInvalidHeapAttributeNumber;
908909

909910
if (attnum==0)
910911
{

‎contrib/sepgsql/dml.c

Lines changed: 2 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -231,7 +231,8 @@ check_relation_privileges(Oid relOid,
231231
updated=fixup_whole_row_references(relOid,updated);
232232
columns=bms_union(selected,bms_union(inserted,updated));
233233

234-
while ((index=bms_first_member(columns)) >=0)
234+
index=-1;
235+
while ((index=bms_next_member(columns,index)) >=0)
235236
{
236237
AttrNumberattnum;
237238
uint32column_perms=0;

‎src/backend/access/heap/heapam.c

Lines changed: 9 additions & 18 deletions
Original file line numberDiff line numberDiff line change
@@ -3859,9 +3859,6 @@ heap_attr_equals(TupleDesc tupdesc, int attrnum, Datum value1, Datum value2,
38593859
* has_external indicates if any of the unmodified attributes (from those
38603860
* listed as interesting) of the old tuple is a member of external_cols and is
38613861
* stored externally.
3862-
*
3863-
* The input interesting_cols bitmapset is destructively modified; that is OK
3864-
* since this is invoked at most once in heap_update.
38653862
*/
38663863
staticBitmapset*
38673864
HeapDetermineColumnsInfo(Relationrelation,
@@ -3870,29 +3867,28 @@ HeapDetermineColumnsInfo(Relation relation,
38703867
HeapTupleoldtup,HeapTuplenewtup,
38713868
bool*has_external)
38723869
{
3873-
intattrnum;
3870+
intattidx;
38743871
Bitmapset*modified=NULL;
38753872
TupleDesctupdesc=RelationGetDescr(relation);
38763873

3877-
while ((attrnum=bms_first_member(interesting_cols)) >=0)
3874+
attidx=-1;
3875+
while ((attidx=bms_next_member(interesting_cols,attidx)) >=0)
38783876
{
3877+
/* attidx is zero-based, attrnum is the normal attribute number */
3878+
AttrNumberattrnum=attidx+FirstLowInvalidHeapAttributeNumber;
38793879
Datumvalue1,
38803880
value2;
38813881
boolisnull1,
38823882
isnull2;
38833883

3884-
attrnum+=FirstLowInvalidHeapAttributeNumber;
3885-
38863884
/*
38873885
* If it's a whole-tuple reference, say "not equal". It's not really
38883886
* worth supporting this case, since it could only succeed after a
38893887
* no-op update, which is hardly a case worth optimizing for.
38903888
*/
38913889
if (attrnum==0)
38923890
{
3893-
modified=bms_add_member(modified,
3894-
attrnum-
3895-
FirstLowInvalidHeapAttributeNumber);
3891+
modified=bms_add_member(modified,attidx);
38963892
continue;
38973893
}
38983894

@@ -3905,9 +3901,7 @@ HeapDetermineColumnsInfo(Relation relation,
39053901
{
39063902
if (attrnum!=TableOidAttributeNumber)
39073903
{
3908-
modified=bms_add_member(modified,
3909-
attrnum-
3910-
FirstLowInvalidHeapAttributeNumber);
3904+
modified=bms_add_member(modified,attidx);
39113905
continue;
39123906
}
39133907
}
@@ -3924,9 +3918,7 @@ HeapDetermineColumnsInfo(Relation relation,
39243918
if (!heap_attr_equals(tupdesc,attrnum,value1,
39253919
value2,isnull1,isnull2))
39263920
{
3927-
modified=bms_add_member(modified,
3928-
attrnum-
3929-
FirstLowInvalidHeapAttributeNumber);
3921+
modified=bms_add_member(modified,attidx);
39303922
continue;
39313923
}
39323924

@@ -3943,8 +3935,7 @@ HeapDetermineColumnsInfo(Relation relation,
39433935
* member of external_cols.
39443936
*/
39453937
if (VARATT_IS_EXTERNAL((structvarlena*)DatumGetPointer(value1))&&
3946-
bms_is_member(attrnum-FirstLowInvalidHeapAttributeNumber,
3947-
external_cols))
3938+
bms_is_member(attidx,external_cols))
39483939
*has_external= true;
39493940
}
39503941

‎src/backend/executor/nodeAgg.c

Lines changed: 2 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1646,7 +1646,8 @@ find_hash_columns(AggState *aggstate)
16461646
}
16471647

16481648
/* and add the remaining columns */
1649-
while ((i=bms_first_member(colnos)) >=0)
1649+
i=-1;
1650+
while ((i=bms_next_member(colnos,i)) >=0)
16501651
{
16511652
perhash->hashGrpColIdxInput[perhash->numhashGrpCols]=i;
16521653
perhash->numhashGrpCols++;

‎src/backend/nodes/bitmapset.c

Lines changed: 0 additions & 42 deletions
Original file line numberDiff line numberDiff line change
@@ -982,48 +982,6 @@ bms_join(Bitmapset *a, Bitmapset *b)
982982
returnresult;
983983
}
984984

985-
/*
986-
* bms_first_member - find and remove first member of a set
987-
*
988-
* Returns -1 if set is empty. NB: set is destructively modified!
989-
*
990-
* This is intended as support for iterating through the members of a set.
991-
* The typical pattern is
992-
*
993-
*while ((x = bms_first_member(inputset)) >= 0)
994-
*process member x;
995-
*
996-
* CAUTION: this destroys the content of "inputset". If the set must
997-
* not be modified, use bms_next_member instead.
998-
*/
999-
int
1000-
bms_first_member(Bitmapset*a)
1001-
{
1002-
intnwords;
1003-
intwordnum;
1004-
1005-
if (a==NULL)
1006-
return-1;
1007-
nwords=a->nwords;
1008-
for (wordnum=0;wordnum<nwords;wordnum++)
1009-
{
1010-
bitmapwordw=a->words[wordnum];
1011-
1012-
if (w!=0)
1013-
{
1014-
intresult;
1015-
1016-
w=RIGHTMOST_ONE(w);
1017-
a->words[wordnum] &= ~w;
1018-
1019-
result=wordnum*BITS_PER_BITMAPWORD;
1020-
result+=bmw_rightmost_one_pos(w);
1021-
returnresult;
1022-
}
1023-
}
1024-
return-1;
1025-
}
1026-
1027985
/*
1028986
* bms_next_member - find next member of a set
1029987
*

‎src/backend/optimizer/plan/subselect.c

Lines changed: 2 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1481,7 +1481,8 @@ convert_EXISTS_sublink_to_join(PlannerInfo *root, SubLink *sublink,
14811481
*/
14821482
clause_varnos=pull_varnos(root,whereClause);
14831483
upper_varnos=NULL;
1484-
while ((varno=bms_first_member(clause_varnos)) >=0)
1484+
varno=-1;
1485+
while ((varno=bms_next_member(clause_varnos,varno)) >=0)
14851486
{
14861487
if (varno <=rtoffset)
14871488
upper_varnos=bms_add_member(upper_varnos,varno);

‎src/backend/parser/parse_expr.c

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -2759,7 +2759,7 @@ make_row_comparison_op(ParseState *pstate, List *opname,
27592759
* them ... this coding arbitrarily picks the lowest btree strategy
27602760
* number.
27612761
*/
2762-
i=bms_first_member(strats);
2762+
i=bms_next_member(strats,-1);
27632763
if (i<0)
27642764
{
27652765
/* No common interpretation, so fail */

‎src/backend/replication/logical/relation.c

Lines changed: 2 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -227,7 +227,8 @@ logicalrep_report_missing_attrs(LogicalRepRelation *remoterel,
227227

228228
initStringInfo(&missingattsbuf);
229229

230-
while ((i=bms_first_member(missingatts)) >=0)
230+
i=-1;
231+
while ((i=bms_next_member(missingatts,i)) >=0)
231232
{
232233
missingattcnt++;
233234
if (missingattcnt==1)

‎src/include/nodes/bitmapset.h

Lines changed: 0 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -115,7 +115,6 @@ extern Bitmapset *bms_del_members(Bitmapset *a, const Bitmapset *b);
115115
externBitmapset*bms_join(Bitmapset*a,Bitmapset*b);
116116

117117
/* support for iterating through the integer elements of a set: */
118-
externintbms_first_member(Bitmapset*a);
119118
externintbms_next_member(constBitmapset*a,intprevbit);
120119
externintbms_prev_member(constBitmapset*a,intprevbit);
121120

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