database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-07-11 10:01:57 +03:00
Code Activity

Modify optimizer data structures so that IndexOptInfo lists built for

Browse Source 
create_index_paths are not immediately discarded, but are available for
subsequent planner work.  This allows avoiding redundant syscache lookups
in several places.  Change interface to operator selectivity estimation
procedures to allow faster and more flexible estimation.
Initdb forced due to change of pg_proc entries for selectivity functions!
This commit is contained in:
Tom Lane
2001-05-20 20:28:20 +00:00
parent 5d53389cfe
commit be03eb25f3
32 changed files with 1147 additions and 1218 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
src/backend/optimizer/prep/prepunion.c
View File

@ -14,7 +14,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/prep/prepunion.c,v 1.63 2001/05/07 00:43:22 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/prep/prepunion.c,v 1.64 2001/05/20 20:28:19 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -515,6 +515,11 @@ find_all_inheritors(Oid parentrel)
* whole inheritance set (parent and children).
* If not, return NIL.
*
* When dup_parent is false, the initially given RT index is part of the
* returned list (if any). When dup_parent is true, the given RT index
* is *not* in the returned list; a duplicate RTE will be made for the
* parent table.
*
* A childless table is never considered to be an inheritance set; therefore
* the result will never be a one-element list. It'll be either empty
* or have two or more elements.
@ -525,7 +530,7 @@ find_all_inheritors(Oid parentrel)
* for the case of an inherited UPDATE/DELETE target relation.
*/
List *
expand_inherted_rtentry(Query *parse, Index rti)
expand_inherted_rtentry(Query *parse, Index rti, bool dup_parent)
{
RangeTblEntry *rte = rt_fetch(rti, parse->rtable);
Oid parentOID = rte->relid;
@ -544,7 +549,6 @@ expand_inherted_rtentry(Query *parse, Index rti)
return NIL;
/* Scan for all members of inheritance set */
inhOIDs = find_all_inheritors(parentOID);
/*
* Check that there's at least one descendant, else treat as no-child
* case. This could happen despite above has_subclass() check, if
@ -553,15 +557,19 @@ expand_inherted_rtentry(Query *parse, Index rti)
if (lnext(inhOIDs) == NIL)
return NIL;
/* OK, it's an inheritance set; expand it */
inhRTIs = makeListi1(rti);
if (dup_parent)
inhRTIs = NIL;
else
inhRTIs = makeListi1(rti); /* include original RTE in result */
foreach(l, inhOIDs)
{
Oid childOID = (Oid) lfirsti(l);
RangeTblEntry *childrte;
Index childRTindex;
/* parent will be in the list too, so ignore it */
if (childOID == parentOID)
/* parent will be in the list too; skip it if not dup requested */
if (childOID == parentOID && !dup_parent)
continue;
/*
@ -578,6 +586,7 @@ expand_inherted_rtentry(Query *parse, Index rti)
inhRTIs = lappendi(inhRTIs, childRTindex);
}
return inhRTIs;
}