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Another round of planner/optimizer work. This is just restructuring and

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code cleanup; no major improvements yet.  However, EXPLAIN does produce
more intuitive outputs for nested loops with indexscans now...
This commit is contained in:
Tom Lane
2000-01-09 00:26:47 +00:00
parent 69d4299e3e
commit 166b5c1def
35 changed files with 1239 additions and 1448 deletions
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23
src/backend/optimizer/path/tidpath.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/tidpath.c,v 1.1 1999/11/23 20:06:55 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/tidpath.c,v 1.2 2000/01/09 00:26:33 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -241,30 +241,27 @@ List *TidqualFromRestrictinfo(List *relids, List * restrictinfo)
List *
create_tidscan_joinpaths(RelOptInfo *rel)
{
List *rlst = NIL, *lst;
TidPath *pathnode = (TidPath *)0;
List *restinfo, *tideval;
List *rlst = NIL,
*lst;
TidPath *pathnode = (TidPath *) NULL;
List *restinfo,
*tideval;
foreach (lst, rel->joininfo)
{
JoinInfo *joininfo = (JoinInfo *)lfirst(lst);
JoinInfo *joininfo = (JoinInfo *)lfirst(lst);
restinfo = joininfo->jinfo_restrictinfo;
tideval = TidqualFromRestrictinfo(rel->relids, restinfo);
if (tideval && length(tideval) == 1)
if (length(tideval) == 1)
{
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);
pathnode->path.path_cost = cost_tidscan(rel, tideval);
pathnode->tideval = tideval;
/*
pathnode->tideval = copyObject(tideval);
freeList(tideval);
*/
pathnode->unjoined_relids = joininfo->unjoined_relids;
rlst = lappend(rlst, pathnode);
}