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Tid access method feature from Hiroshi Inoue, Inoue@tpf.co.jp

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This commit is contained in:
Bruce Momjian
1999-11-23 20:07:06 +00:00
parent 54ffd4677a
commit 6f9ff92cc0
28 changed files with 1396 additions and 32 deletions
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28
src/backend/optimizer/util/pathnode.c
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@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/util/pathnode.c,v 1.54 1999/08/16 02:17:58 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/util/pathnode.c,v 1.55 1999/11/23 20:07:00 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -318,6 +318,32 @@ create_index_path(Query *root,
return pathnode;
}
/*
* create_tidscan_path
* Creates a path corresponding to a tid_direct scan, returning the
* pathnode.
*
*/
TidPath *
create_tidscan_path(RelOptInfo *rel, List *tideval)
{
TidPath *pathnode = makeNode(TidPath);
pathnode->path.pathtype = T_TidScan;
pathnode->path.parent = rel;
pathnode->path.path_cost = 0.0;
pathnode->path.pathkeys = NIL;
pathnode->path.path_cost = cost_tidscan(tideval);
/* divide selectivity for each clause to get an equal selectivity
* as IndexScan does OK ?
*/
pathnode->tideval = copyObject(tideval);
pathnode->unjoined_relids = NIL;
return pathnode;
}
/*
* create_nestloop_path
* Creates a pathnode corresponding to a nestloop join between two