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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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22
src/backend/optimizer/path/indxpath.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/indxpath.c,v 1.76 2000/01/09 00:26:31 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/indxpath.c,v 1.77 2000/01/22 23:50:14 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -1393,19 +1393,6 @@ index_innerjoin(Query *root, RelOptInfo *rel, IndexOptInfo *index,
List *clausegroup = lfirst(i);
IndexPath *pathnode = makeNode(IndexPath);
List *indexquals;
long npages;
Selectivity selec;
indexquals = get_actual_clauses(clausegroup);
/* expand special operators to indexquals the executor can handle */
indexquals = expand_indexqual_conditions(indexquals);
index_selectivity(root,
rel,
index,
indexquals,
&npages,
&selec);
/* XXX this code ought to be merged with create_index_path? */
@ -1413,6 +1400,10 @@ index_innerjoin(Query *root, RelOptInfo *rel, IndexOptInfo *index,
pathnode->path.parent = rel;
pathnode->path.pathkeys = build_index_pathkeys(root, rel, index);
indexquals = get_actual_clauses(clausegroup);
/* expand special operators to indexquals the executor can handle */
indexquals = expand_indexqual_conditions(indexquals);
/* Note that we are making a pathnode for a single-scan indexscan;
* therefore, both indexid and indexqual should be single-element
* lists.
@ -1423,8 +1414,7 @@ index_innerjoin(Query *root, RelOptInfo *rel, IndexOptInfo *index,
/* joinrelids saves the rels needed on the outer side of the join */
pathnode->joinrelids = lfirst(outerrelids_list);
pathnode->path.path_cost = cost_index(rel, index,
npages, selec,
pathnode->path.path_cost = cost_index(root, rel, index, indexquals,
true);
path_list = lappend(path_list, pathnode);