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Optimizer rename ClauseInfo -> RestrictInfo. Update optimizer README.

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This commit is contained in:
Bruce Momjian
1999-02-03 20:15:53 +00:00
parent f3a6b38e32
commit 8d9237d485
35 changed files with 450 additions and 455 deletions
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40
src/backend/optimizer/path/clausesel.c
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@@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/clausesel.c,v 1.14 1998/11/09 02:49:13 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/clausesel.c,v 1.15 1999/02/03 20:15:28 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@@ -19,7 +19,7 @@
#include "nodes/primnodes.h"
#include "nodes/relation.h"
#include "optimizer/clauses.h"
#include "optimizer/clauseinfo.h"
#include "optimizer/restrictinfo.h"
#include "optimizer/cost.h"
#include "optimizer/internal.h"
#include "optimizer/plancat.h"
@@ -35,7 +35,7 @@ static Cost compute_selec(Query *root, List *clauses, List *or_selectivities);
/*
* set_clause_selectivities -
* Sets the selectivity field for each of clause in 'clauseinfo-list'
* Sets the selectivity field for each of clause in 'restrictinfo-list'
* to 'new-selectivity'. If the selectivity has already been set, reset
* it only if the new one is better.
*
@@ -43,15 +43,15 @@ static Cost compute_selec(Query *root, List *clauses, List *or_selectivities);
*
*/
void
set_clause_selectivities(List *clauseinfo_list, Cost new_selectivity)
set_clause_selectivities(List *restrictinfo_list, Cost new_selectivity)
{
List *temp;
ClauseInfo *clausenode;
RestrictInfo *clausenode;
Cost cost_clause;
foreach(temp, clauseinfo_list)
foreach(temp, restrictinfo_list)
{
clausenode = (ClauseInfo *) lfirst(temp);
clausenode = (RestrictInfo *) lfirst(temp);
cost_clause = clausenode->selectivity;
if (FLOAT_IS_ZERO(cost_clause) || new_selectivity < cost_clause)
clausenode->selectivity = new_selectivity;
@@ -60,23 +60,23 @@ set_clause_selectivities(List *clauseinfo_list, Cost new_selectivity)
/*
* product_selec -
* Multiplies the selectivities of each clause in 'clauseinfo-list'.
* Multiplies the selectivities of each clause in 'restrictinfo-list'.
*
* Returns a flonum corresponding to the selectivity of 'clauseinfo-list'.
* Returns a flonum corresponding to the selectivity of 'restrictinfo-list'.
*/
Cost
product_selec(List *clauseinfo_list)
product_selec(List *restrictinfo_list)
{
Cost result = 1.0;
if (clauseinfo_list != NIL)
if (restrictinfo_list != NIL)
{
List *xclausenode = NIL;
Cost temp;
foreach(xclausenode, clauseinfo_list)
foreach(xclausenode, restrictinfo_list)
{
temp = ((ClauseInfo *) lfirst(xclausenode))->selectivity;
temp = ((RestrictInfo *) lfirst(xclausenode))->selectivity;
result = result * temp;
}
}
@@ -89,7 +89,7 @@ product_selec(List *clauseinfo_list)
* those clauses that haven't been assigned a selectivity by an index.
*
* Returns nothing of interest.
* MODIFIES: selectivities of the various rel's clauseinfo
* MODIFIES: selectivities of the various rel's restrictinfo
* slots.
*/
void
@@ -101,28 +101,28 @@ set_rest_relselec(Query *root, List *rel_list)
foreach(x, rel_list)
{
rel = (RelOptInfo *) lfirst(x);
set_rest_selec(root, rel->clauseinfo);
set_rest_selec(root, rel->restrictinfo);
}
}
/*
* set_rest_selec -
* Sets the selectivity fields for those clauses within a single
* relation's 'clauseinfo-list' that haven't already been set.
* relation's 'restrictinfo-list' that haven't already been set.
*
* Returns nothing of interest.
*
*/
void
set_rest_selec(Query *root, List *clauseinfo_list)
set_rest_selec(Query *root, List *restrictinfo_list)
{
List *temp = NIL;
ClauseInfo *clausenode = (ClauseInfo *) NULL;
RestrictInfo *clausenode = (RestrictInfo *) NULL;
Cost cost_clause;
foreach(temp, clauseinfo_list)
foreach(temp, restrictinfo_list)
{
clausenode = (ClauseInfo *) lfirst(temp);
clausenode = (RestrictInfo *) lfirst(temp);
cost_clause = clausenode->selectivity;
/*