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Revise cost_qual_eval() to compute both startup (one-time) and per-tuple

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costs for expression evaluation, not only per-tuple cost as before.
This extension is needed in order to deal realistically with hashed or
materialized sub-selects.
This commit is contained in:
Tom Lane
2003-01-12 22:35:29 +00:00
parent d51260aa9d
commit d4ce5a4f4c
8 changed files with 164 additions and 71 deletions
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8
src/backend/optimizer/util/relnode.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/util/relnode.c,v 1.41 2002/11/24 21:52:14 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/util/relnode.c,v 1.42 2003/01/12 22:35:29 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -149,7 +149,8 @@ make_base_rel(Query *root, int relid)
rel->joinrti = 0;
rel->joinrteids = NIL;
rel->baserestrictinfo = NIL;
rel->baserestrictcost = 0;
rel->baserestrictcost.startup = 0;
rel->baserestrictcost.per_tuple = 0;
rel->outerjoinset = NIL;
rel->joininfo = NIL;
rel->index_outer_relids = NIL;
@ -363,7 +364,8 @@ build_join_rel(Query *root,
joinrel->joinrteids = nconc(listCopy(outer_rel->joinrteids),
inner_rel->joinrteids);
joinrel->baserestrictinfo = NIL;
joinrel->baserestrictcost = 0;
joinrel->baserestrictcost.startup = 0;
joinrel->baserestrictcost.per_tuple = 0;
joinrel->outerjoinset = NIL;
joinrel->joininfo = NIL;
joinrel->index_outer_relids = NIL;