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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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51
src/backend/commands/variable.c
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@ -2,7 +2,7 @@
* Routines for handling of 'SET var TO',
* 'SHOW var' and 'RESET var' statements.
*
* $Id: variable.c,v 1.27 2000/01/15 02:59:29 petere Exp $
* $Id: variable.c,v 1.28 2000/01/22 23:50:10 tgl Exp $
*
*/
@ -14,7 +14,8 @@
#include "catalog/pg_shadow.h"
#include "commands/variable.h"
#include "miscadmin.h"
#include "optimizer/internal.h"
#include "optimizer/cost.h"
#include "optimizer/paths.h"
#include "utils/builtins.h"
#include "utils/tqual.h"
#include "utils/trace.h"
@ -45,10 +46,6 @@ static bool show_XactIsoLevel(void);
static bool reset_XactIsoLevel(void);
static bool parse_XactIsoLevel(const char *);
extern Cost _cpu_page_weight_;
extern Cost _cpu_index_page_weight_;
extern bool _use_geqo_;
extern int32 _use_geqo_rels_;
extern bool _use_keyset_query_optimizer;
/*
@ -183,23 +180,23 @@ parse_geqo(const char *value)
if (strcasecmp(tok, "on") == 0)
{
int32 geqo_rels = GEQO_RELS;
int new_geqo_rels = GEQO_RELS;
if (val != NULL)
{
geqo_rels = pg_atoi(val, sizeof(int32), '\0');
if (geqo_rels <= 1)
new_geqo_rels = pg_atoi(val, sizeof(int), '\0');
if (new_geqo_rels <= 1)
elog(ERROR, "Bad value for # of relations (%s)", val);
pfree(val);
}
_use_geqo_ = true;
_use_geqo_rels_ = geqo_rels;
enable_geqo = true;
geqo_rels = new_geqo_rels;
}
else if (strcasecmp(tok, "off") == 0)
{
if ((val != NULL) && (*val != '\0'))
elog(ERROR, "%s does not allow a parameter", tok);
_use_geqo_ = false;
enable_geqo = false;
}
else
elog(ERROR, "Bad value for GEQO (%s)", value);
@ -212,8 +209,8 @@ static bool
show_geqo()
{
if (_use_geqo_)
elog(NOTICE, "GEQO is ON beginning with %d relations", _use_geqo_rels_);
if (enable_geqo)
elog(NOTICE, "GEQO is ON beginning with %d relations", geqo_rels);
else
elog(NOTICE, "GEQO is OFF");
return TRUE;
@ -224,11 +221,11 @@ reset_geqo(void)
{
#ifdef GEQO
_use_geqo_ = true;
enable_geqo = true;
#else
_use_geqo_ = false;
enable_geqo = false;
#endif
_use_geqo_rels_ = GEQO_RELS;
geqo_rels = GEQO_RELS;
return TRUE;
}
@ -240,7 +237,7 @@ reset_geqo(void)
static bool
parse_cost_heap(const char *value)
{
float32 res;
float64 res;
if (value == NULL)
{
@ -248,8 +245,8 @@ parse_cost_heap(const char *value)
return TRUE;
}
res = float4in((char *) value);
_cpu_page_weight_ = *res;
res = float8in((char *) value);
cpu_page_weight = *res;
return TRUE;
}
@ -258,14 +255,14 @@ static bool
show_cost_heap()
{
elog(NOTICE, "COST_HEAP is %f", _cpu_page_weight_);
elog(NOTICE, "COST_HEAP is %f", cpu_page_weight);
return TRUE;
}
static bool
reset_cost_heap()
{
_cpu_page_weight_ = _CPU_PAGE_WEIGHT_;
cpu_page_weight = CPU_PAGE_WEIGHT;
return TRUE;
}
@ -277,7 +274,7 @@ reset_cost_heap()
static bool
parse_cost_index(const char *value)
{
float32 res;
float64 res;
if (value == NULL)
{
@ -285,8 +282,8 @@ parse_cost_index(const char *value)
return TRUE;
}
res = float4in((char *) value);
_cpu_index_page_weight_ = *res;
res = float8in((char *) value);
cpu_index_page_weight = *res;
return TRUE;
}
@ -295,14 +292,14 @@ static bool
show_cost_index()
{
elog(NOTICE, "COST_INDEX is %f", _cpu_index_page_weight_);
elog(NOTICE, "COST_INDEX is %f", cpu_index_page_weight);
return TRUE;
}
static bool
reset_cost_index()
{
_cpu_index_page_weight_ = _CPU_INDEX_PAGE_WEIGHT_;
cpu_index_page_weight = CPU_INDEX_PAGE_WEIGHT;
return TRUE;
}