database/postgres
database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-06-01 14:21:49 +03:00
Code

Push lpp variable closer to usage in heapgetpage()

Browse Source 
Author: Melanie Plageman <melanieplageman@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/CAAKRu_YSOnhKsDyFcqJsKtBSrd32DP-jjXmv7hL0BPD-z0TGXQ@mail.gmail.com
This commit is contained in:
Peter Eisentraut 2023-01-02 09:39:04 +01:00
parent 72e0ff2677
commit e351f85418
1 changed files with 19 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

40
src/backend/access/heap/heapam.c
View File

@ -383,7 +383,6 @@ heapgetpage(TableScanDesc sscan, BlockNumber block)
int lines; int lines;
int ntup; int ntup;
OffsetNumber lineoff; OffsetNumber lineoff;
ItemId lpp;
bool all_visible; bool all_visible;
Assert(block < scan->rs_nblocks); Assert(block < scan->rs_nblocks);
@ -452,31 +451,30 @@ heapgetpage(TableScanDesc sscan, BlockNumber block)
*/ */
all_visible = PageIsAllVisible(page) && !snapshot->takenDuringRecovery; all_visible = PageIsAllVisible(page) && !snapshot->takenDuringRecovery;
for (lineoff = FirstOffsetNumber, lpp = PageGetItemId(page, lineoff); for (lineoff = FirstOffsetNumber; lineoff <= lines; lineoff++)
lineoff <= lines;
lineoff++, lpp++)
{ {
if (ItemIdIsNormal(lpp)) ItemId lpp = PageGetItemId(page, lineoff);
{ HeapTupleData loctup;
HeapTupleData loctup; bool valid;
bool valid;
loctup.t_tableOid = RelationGetRelid(scan->rs_base.rs_rd); if (!ItemIdIsNormal(lpp))
loctup.t_data = (HeapTupleHeader) PageGetItem(page, lpp); continue;
loctup.t_len = ItemIdGetLength(lpp);
ItemPointerSet(&(loctup.t_self), block, lineoff);
if (all_visible) loctup.t_tableOid = RelationGetRelid(scan->rs_base.rs_rd);
valid = true; loctup.t_data = (HeapTupleHeader) PageGetItem(page, lpp);
else loctup.t_len = ItemIdGetLength(lpp);
valid = HeapTupleSatisfiesVisibility(&loctup, snapshot, buffer); ItemPointerSet(&(loctup.t_self), block, lineoff);
HeapCheckForSerializableConflictOut(valid, scan->rs_base.rs_rd, if (all_visible)
&loctup, buffer, snapshot); valid = true;
else
valid = HeapTupleSatisfiesVisibility(&loctup, snapshot, buffer);
if (valid) HeapCheckForSerializableConflictOut(valid, scan->rs_base.rs_rd,
scan->rs_vistuples[ntup++] = lineoff; &loctup, buffer, snapshot);
}
if (valid)
scan->rs_vistuples[ntup++] = lineoff;
} }
LockBuffer(buffer, BUFFER_LOCK_UNLOCK); LockBuffer(buffer, BUFFER_LOCK_UNLOCK);