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Revise handling of index-type-specific indexscan cost estimation, per

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pghackers discussion of 5-Jan-2000.  The amopselect and amopnpages
estimators are gone, and in their place is a per-AM amcostestimate
procedure (linked to from pg_am, not pg_amop).
This commit is contained in:
Tom Lane
2000-01-22 23:50:30 +00:00
parent 78845177bb
commit 71ed7eb494
30 changed files with 502 additions and 1113 deletions
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15
src/backend/optimizer/path/allpaths.c
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@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/allpaths.c,v 1.55 2000/01/09 00:26:29 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/allpaths.c,v 1.56 2000/01/22 23:50:14 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -21,13 +21,12 @@
#include "optimizer/paths.h"
#ifdef GEQO
bool _use_geqo_ = true;
bool enable_geqo = true;
#else
bool _use_geqo_ = false;
bool enable_geqo = false;
#endif
int32 _use_geqo_rels_ = GEQO_RELS;
int geqo_rels = GEQO_RELS;
static void set_base_rel_pathlist(Query *root, List *rels);
@ -165,11 +164,11 @@ make_one_rel_by_joins(Query *root, List *rels, int levels_needed)
* genetic query optimizer entry point *
* <utesch@aut.tu-freiberg.de> *
*******************************************/
if ((_use_geqo_) && length(root->base_rel_list) >= _use_geqo_rels_)
if (enable_geqo && length(root->base_rel_list) >= geqo_rels)
return geqo(root);
/*******************************************
* rest will be deprecated in case of GEQO *
* rest will be skipped in case of GEQO *
*******************************************/
while (--levels_needed)