mirror of
https://github.com/postgres/postgres.git
synced 2025-07-08 11:42:09 +03:00
Revise handling of index-type-specific indexscan cost estimation, per
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:
@ -7,7 +7,7 @@
|
||||
*
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/orindxpath.c,v 1.33 2000/01/09 00:26:33 tgl Exp $
|
||||
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/orindxpath.c,v 1.34 2000/01/22 23:50:15 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -215,21 +215,11 @@ best_or_subclause_index(Query *root,
|
||||
foreach(ilist, indices)
|
||||
{
|
||||
IndexOptInfo *index = (IndexOptInfo *) lfirst(ilist);
|
||||
long npages;
|
||||
Selectivity selec;
|
||||
Cost subcost;
|
||||
|
||||
Assert(IsA(index, IndexOptInfo));
|
||||
|
||||
index_selectivity(root,
|
||||
rel,
|
||||
index,
|
||||
indexqual,
|
||||
&npages,
|
||||
&selec);
|
||||
|
||||
subcost = cost_index(rel, index,
|
||||
npages, selec,
|
||||
subcost = cost_index(root, rel, index, indexqual,
|
||||
false);
|
||||
|
||||
if (first_run || subcost < *retCost)
|
||||
|
Reference in New Issue
Block a user