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Adjust scan plan nodes to avoid getting an extra AccessShareLock on a

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relation if it's already been locked by execMain.c as either a result
relation or a FOR UPDATE/SHARE relation.  This avoids an extra trip to
the shared lock manager state.  Per my suggestion yesterday.
This commit is contained in:
Tom Lane
2005-12-02 20:03:42 +00:00
parent 5ab2598875
commit d780f07ac1
9 changed files with 135 additions and 92 deletions
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5
src/include/executor/executor.h
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/executor/executor.h,v 1.121 2005/11/23 20:27:58 tgl Exp $
* $PostgreSQL: pgsql/src/include/executor/executor.h,v 1.122 2005/12/02 20:03:42 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -230,6 +230,9 @@ extern void ExecAssignScanType(ScanState *scanstate,
TupleDesc tupDesc, bool shouldFree);
extern void ExecAssignScanTypeFromOuterPlan(ScanState *scanstate);
extern Relation ExecOpenScanRelation(EState *estate, Index scanrelid);
extern void ExecCloseScanRelation(Relation scanrel);
extern void ExecOpenIndices(ResultRelInfo *resultRelInfo);
extern void ExecCloseIndices(ResultRelInfo *resultRelInfo);
extern void ExecInsertIndexTuples(TupleTableSlot *slot, ItemPointer tupleid,