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Add a back-link from IndexOptInfo structs to their parent RelOptInfo

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structs.  There are many places in the planner where we were passing
both a rel and an index to subroutines, and now need only pass the
index struct.  Notationally simpler, and perhaps a tad faster.
This commit is contained in:
Tom Lane
2005-03-27 06:29:49 +00:00
parent febc9a613c
commit 926e8a00d3
11 changed files with 95 additions and 141 deletions
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14
src/backend/optimizer/util/pathnode.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/optimizer/util/pathnode.c,v 1.113 2005/03/26 23:29:18 tgl Exp $
* $PostgreSQL: pgsql/src/backend/optimizer/util/pathnode.c,v 1.114 2005/03/27 06:29:42 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -417,8 +417,7 @@ create_seqscan_path(Query *root, RelOptInfo *rel)
* create_index_path
* Creates a path node for an index scan.
*
* 'rel' is the parent rel
* 'index' is an index on 'rel'
* 'index' is a usable index.
* 'restriction_clauses' is a list of lists of RestrictInfo nodes
* to be used as index qual conditions in the scan.
* 'pathkeys' describes the ordering of the path.
@ -430,7 +429,6 @@ create_seqscan_path(Query *root, RelOptInfo *rel)
*/
IndexPath *
create_index_path(Query *root,
RelOptInfo *rel,
IndexOptInfo *index,
List *restriction_clauses,
List *pathkeys,
@ -440,11 +438,11 @@ create_index_path(Query *root,
List *indexquals;
pathnode->path.pathtype = T_IndexScan;
pathnode->path.parent = rel;
pathnode->path.parent = index->rel;
pathnode->path.pathkeys = pathkeys;
/* Convert clauses to indexquals the executor can handle */
indexquals = expand_indexqual_conditions(rel, index, restriction_clauses);
indexquals = expand_indexqual_conditions(index, restriction_clauses);
/* Flatten the clause-groups list to produce indexclauses list */
restriction_clauses = flatten_clausegroups_list(restriction_clauses);
@ -466,9 +464,9 @@ create_index_path(Query *root,
* The number of rows is the same as the parent rel's estimate, since
* this isn't a join inner indexscan.
*/
pathnode->rows = rel->rows;
pathnode->rows = index->rel->rows;
cost_index(&pathnode->path, root, rel, index, indexquals, false);
cost_index(&pathnode->path, root, index, indexquals, false);
return pathnode;
}