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Grab predicate locks on matching tuples in a lossy bitmap heap scan. 

Non-lossy case was already handled correctly.

Kevin Grittner
This commit is contained in:
Heikki Linnakangas 2011-06-29 21:40:27 +03:00
parent 79aa44536f
commit d9fe63acb0
1 changed files with 11 additions and 1 deletions
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12
src/backend/executor/nodeBitmapHeapscan.c
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@ -42,6 +42,7 @@
#include "executor/nodeBitmapHeapscan.h"
#include "pgstat.h"
#include "storage/bufmgr.h"
#include "storage/predicate.h"
#include "utils/memutils.h"
#include "utils/snapmgr.h"
#include "utils/tqual.h"
@ -371,14 +372,23 @@ bitgetpage(HeapScanDesc scan, TBMIterateResult *tbmres)
{
ItemId lp;
HeapTupleData loctup;
bool valid;
lp = PageGetItemId(dp, offnum);
if (!ItemIdIsNormal(lp))
continue;
loctup.t_data = (HeapTupleHeader) PageGetItem((Page) dp, lp);
loctup.t_len = ItemIdGetLength(lp);
if (HeapTupleSatisfiesVisibility(&loctup, snapshot, buffer))
loctup.t_tableOid = scan->rs_rd->rd_id;
ItemPointerSet(&loctup.t_self, page, offnum);
valid = HeapTupleSatisfiesVisibility(&loctup, snapshot, buffer);
if (valid)
{
scan->rs_vistuples[ntup++] = offnum;
PredicateLockTuple(scan->rs_rd, &loctup, snapshot);
}
CheckForSerializableConflictOut(valid, scan->rs_rd, &loctup,
buffer, snapshot);
}
}