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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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3
src/include/access/genam.h
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@@ -6,7 +6,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: genam.h,v 1.21 1999/12/30 05:05:13 tgl Exp $
* $Id: genam.h,v 1.22 2000/01/22 23:50:22 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -38,6 +38,7 @@ extern void index_markpos(IndexScanDesc scan);
extern void index_restrpos(IndexScanDesc scan);
extern RetrieveIndexResult index_getnext(IndexScanDesc scan,
ScanDirection direction);
extern RegProcedure index_cost_estimator(Relation relation);
extern RegProcedure index_getprocid(Relation irel, AttrNumber attnum,
uint16 procnum);
extern Datum GetIndexValue(HeapTuple tuple, TupleDesc hTupDesc,