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Replace typtoout() and gettypelem() with a single routine,

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so that fetching an attribute value needs only one SearchSysCacheTuple call
instead of two redundant searches.  This speeds up a large SELECT by about
ten percent, and probably will help GROUP BY and SELECT DISTINCT too.
This commit is contained in:
Tom Lane
1999-01-24 05:40:49 +00:00
parent 77f5428244
commit d03e98737c
6 changed files with 74 additions and 78 deletions
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5
src/include/access/printtup.h
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@@ -6,7 +6,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: printtup.h,v 1.5 1998/09/01 04:34:22 momjian Exp $
* $Id: printtup.h,v 1.6 1999/01/24 05:40:46 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -16,11 +16,10 @@
#include <access/htup.h>
#include <access/tupdesc.h>
extern Oid typtoout(Oid type);
extern int getTypeOutAndElem(Oid type, Oid* typOutput, Oid* typElem);
extern void printtup(HeapTuple tuple, TupleDesc typeinfo);
extern void showatts(char *name, TupleDesc attinfo);
extern void debugtup(HeapTuple tuple, TupleDesc typeinfo);
extern void printtup_internal(HeapTuple tuple, TupleDesc typeinfo);
extern Oid gettypelem(Oid type);
#endif /* PRINTTUP_H */