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Commite351f85

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Push lpp variable closer to usage in heapgetpage()
Author: Melanie Plageman <melanieplageman@gmail.com>Discussion:https://www.postgresql.org/message-id/flat/CAAKRu_YSOnhKsDyFcqJsKtBSrd32DP-jjXmv7hL0BPD-z0TGXQ@mail.gmail.com
1 parent72e0ff2 commite351f85

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1 file changed

+19
-21
lines changed

1 file changed

+19
-21
lines changed

‎src/backend/access/heap/heapam.c

Lines changed: 19 additions & 21 deletions
Original file line numberDiff line numberDiff line change
@@ -383,7 +383,6 @@ heapgetpage(TableScanDesc sscan, BlockNumber block)
383383
intlines;
384384
intntup;
385385
OffsetNumberlineoff;
386-
ItemIdlpp;
387386
boolall_visible;
388387

389388
Assert(block<scan->rs_nblocks);
@@ -452,31 +451,30 @@ heapgetpage(TableScanDesc sscan, BlockNumber block)
452451
*/
453452
all_visible=PageIsAllVisible(page)&& !snapshot->takenDuringRecovery;
454453

455-
for (lineoff=FirstOffsetNumber,lpp=PageGetItemId(page,lineoff);
456-
lineoff <=lines;
457-
lineoff++,lpp++)
454+
for (lineoff=FirstOffsetNumber;lineoff <=lines;lineoff++)
458455
{
459-
if (ItemIdIsNormal(lpp))
460-
{
461-
HeapTupleDataloctup;
462-
boolvalid;
456+
ItemIdlpp=PageGetItemId(page,lineoff);
457+
HeapTupleDataloctup;
458+
boolvalid;
463459

464-
loctup.t_tableOid=RelationGetRelid(scan->rs_base.rs_rd);
465-
loctup.t_data= (HeapTupleHeader)PageGetItem(page,lpp);
466-
loctup.t_len=ItemIdGetLength(lpp);
467-
ItemPointerSet(&(loctup.t_self),block,lineoff);
460+
if (!ItemIdIsNormal(lpp))
461+
continue;
468462

469-
if (all_visible)
470-
valid=true;
471-
else
472-
valid=HeapTupleSatisfiesVisibility(&loctup,snapshot,buffer);
463+
loctup.t_tableOid=RelationGetRelid(scan->rs_base.rs_rd);
464+
loctup.t_data=(HeapTupleHeader)PageGetItem(page,lpp);
465+
loctup.t_len=ItemIdGetLength(lpp);
466+
ItemPointerSet(&(loctup.t_self),block,lineoff);
473467

474-
HeapCheckForSerializableConflictOut(valid,scan->rs_base.rs_rd,
475-
&loctup,buffer,snapshot);
468+
if (all_visible)
469+
valid= true;
470+
else
471+
valid=HeapTupleSatisfiesVisibility(&loctup,snapshot,buffer);
476472

477-
if (valid)
478-
scan->rs_vistuples[ntup++]=lineoff;
479-
}
473+
HeapCheckForSerializableConflictOut(valid,scan->rs_base.rs_rd,
474+
&loctup,buffer,snapshot);
475+
476+
if (valid)
477+
scan->rs_vistuples[ntup++]=lineoff;
480478
}
481479

482480
LockBuffer(buffer,BUFFER_LOCK_UNLOCK);

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