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Commita7b9d24

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Make deduplication use number of key attributes.
Use IndexRelationGetNumberOfKeyAttributes() rather thanIndexRelationGetNumberOfAttributes() when determining whether or not twoindex tuples are suitable for merging together into a single postinglist tuple. This is a little bit tidier. It brings affected code innbtdedup.c a little closer to similar, related code in nbtsplitloc.c.
1 parent9950c8a commita7b9d24

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‎src/backend/access/nbtree/nbtdedup.c

Lines changed: 5 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -68,7 +68,7 @@ _bt_dedup_one_page(Relation rel, Buffer buf, Relation heapRel,
6868
intndeletable=0;
6969
Sizepagesaving=0;
7070
boolsinglevalstrat= false;
71-
intnatts=IndexRelationGetNumberOfAttributes(rel);
71+
intnkeyatts=IndexRelationGetNumberOfKeyAttributes(rel);
7272

7373
/*
7474
* We can't assume that there are no LP_DEAD items. For one thing, VACUUM
@@ -182,7 +182,7 @@ _bt_dedup_one_page(Relation rel, Buffer buf, Relation heapRel,
182182
_bt_dedup_start_pending(state,itup,offnum);
183183
}
184184
elseif (state->deduplicate&&
185-
_bt_keep_natts_fast(rel,state->base,itup)>natts&&
185+
_bt_keep_natts_fast(rel,state->base,itup)>nkeyatts&&
186186
_bt_dedup_save_htid(state,itup))
187187
{
188188
/*
@@ -519,19 +519,19 @@ static bool
519519
_bt_do_singleval(Relationrel,Pagepage,BTDedupStatestate,
520520
OffsetNumberminoff,IndexTuplenewitem)
521521
{
522-
intnatts=IndexRelationGetNumberOfAttributes(rel);
522+
intnkeyatts=IndexRelationGetNumberOfKeyAttributes(rel);
523523
ItemIditemid;
524524
IndexTupleitup;
525525

526526
itemid=PageGetItemId(page,minoff);
527527
itup= (IndexTuple)PageGetItem(page,itemid);
528528

529-
if (_bt_keep_natts_fast(rel,newitem,itup)>natts)
529+
if (_bt_keep_natts_fast(rel,newitem,itup)>nkeyatts)
530530
{
531531
itemid=PageGetItemId(page,PageGetMaxOffsetNumber(page));
532532
itup= (IndexTuple)PageGetItem(page,itemid);
533533

534-
if (_bt_keep_natts_fast(rel,newitem,itup)>natts)
534+
if (_bt_keep_natts_fast(rel,newitem,itup)>nkeyatts)
535535
return true;
536536
}
537537

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