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Refactor ExecGetJunkAttribute to avoid searching for junk attributes

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by name on each and every row processed.  Profiling suggests this may
buy a percent or two for simple UPDATE scenarios, which isn't huge,
but when it's so easy to get ...
This commit is contained in:
Tom Lane
2006-12-04 02:06:55 +00:00
parent 406d028a9b
commit 8dcc8e3761
4 changed files with 90 additions and 54 deletions
src
backend
executor
execJunk.cexecMain.c
include
executor
executor.h
nodes
execnodes.h

8
src/include/executor/executor.h

@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/executor/executor.h,v 1.130 2006/10/04 00:30:08 momjian Exp $
* $PostgreSQL: pgsql/src/include/executor/executor.h,v 1.131 2006/12/04 02:06:55 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -110,8 +110,10 @@ extern JunkFilter *ExecInitJunkFilter(List *targetList, bool hasoid,
extern JunkFilter *ExecInitJunkFilterConversion(List *targetList,
TupleDesc cleanTupType,
TupleTableSlot *slot);
extern bool ExecGetJunkAttribute(JunkFilter *junkfilter, TupleTableSlot *slot,
char *attrName, Datum *value, bool *isNull);
extern AttrNumber ExecFindJunkAttribute(JunkFilter *junkfilter,
const char *attrName);
extern Datum ExecGetJunkAttribute(TupleTableSlot *slot, AttrNumber attno,
bool *isNull);
extern TupleTableSlot *ExecFilterJunk(JunkFilter *junkfilter,
TupleTableSlot *slot);
extern HeapTuple ExecRemoveJunk(JunkFilter *junkfilter, TupleTableSlot *slot);