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First step in fixing selectivity-estimation code. eqsel and

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neqsel now behave as per my suggestions in pghackers a few days ago.
selectivity for < > <= >= should work OK for integral types as well, but
still need work for nonintegral types.  Since these routines have never
actually executed before :-(, this may result in some significant changes
in the optimizer's choices of execution plans.  Let me know if you see
any serious misbehavior.
CAUTION: THESE CHANGES REQUIRE INITDB.  pg_statistic table has changed.
This commit is contained in:
Tom Lane
1999-08-01 04:54:25 +00:00
parent f851c6b07d
commit 44878506d8
5 changed files with 542 additions and 206 deletions
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10
src/include/utils/builtins.h
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@ -6,7 +6,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: builtins.h,v 1.84 1999/07/16 17:07:39 momjian Exp $
* $Id: builtins.h,v 1.85 1999/08/01 04:54:20 tgl Exp $
*
* NOTES
* This should normally only be included by fmgr.h.
@ -372,10 +372,10 @@ extern Oid regproctooid(RegProcedure rp);
#define RegprocToOid(rp) regproctooid(rp)
/* selfuncs.c */
extern float64 eqsel(Oid opid, Oid relid, AttrNumber attno, char *value, int32 flag);
extern float64 neqsel(Oid opid, Oid relid, AttrNumber attno, char *value, int32 flag);
extern float64 intltsel(Oid opid, Oid relid, AttrNumber attno, int32 value, int32 flag);
extern float64 intgtsel(Oid opid, Oid relid, AttrNumber attno, int32 value, int32 flag);
extern float64 eqsel(Oid opid, Oid relid, AttrNumber attno, Datum value, int32 flag);
extern float64 neqsel(Oid opid, Oid relid, AttrNumber attno, Datum value, int32 flag);
extern float64 intltsel(Oid opid, Oid relid, AttrNumber attno, Datum value, int32 flag);
extern float64 intgtsel(Oid opid, Oid relid, AttrNumber attno, Datum value, int32 flag);
extern float64 eqjoinsel(Oid opid, Oid relid1, AttrNumber attno1, Oid relid2, AttrNumber attno2);
extern float64 neqjoinsel(Oid opid, Oid relid1, AttrNumber attno1, Oid relid2, AttrNumber attno2);
extern float64 intltjoinsel(Oid opid, Oid relid1, AttrNumber attno1, Oid relid2, AttrNumber attno2);