database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-10-27 00:12:01 +03:00
Code Activity

1) Queries using the having clause on base tables should work well

Browse Source 
now. Here some tested features, (examples included in the patch):

1.1) Subselects in the having clause 1.2) Double nested subselects
1.3) Subselects used in the where clause and in the having clause
     simultaneously 1.4) Union Selects using having 1.5) Indexes
on the base relations are used correctly 1.6) Unallowed Queries
are prevented (e.g. qualifications in the
     having clause that belong to the where clause) 1.7) Insert
into as select

2) Queries using the having clause on view relations also work
   but there are some restrictions:

2.1) Create View as Select ... Having ...; using base tables in
the select 2.1.1) The Query rewrite system:

2.1.2) Why are only simple queries allowed against a view from 2.1)
? 2.2) Select ... from testview1, testview2, ... having...; 3) Bug
in ExecMergeJoin ??


Regards Stefan
This commit is contained in:
Bruce Momjian
1998-07-19 05:49:26 +00:00
parent 916710fc91
commit 460b20a43f
13 changed files with 997 additions and 537 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
src/include/optimizer/planmain.h
View File

@@ -6,7 +6,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: planmain.h,v 1.12 1998/04/15 15:29:57 momjian Exp $
* $Id: planmain.h,v 1.13 1998/07/19 05:49:25 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@@ -64,6 +64,8 @@ extern void set_result_tlist_references(Result *resultNode);
extern List *set_agg_tlist_references(Agg *aggNode);
extern void set_agg_agglist_references(Agg *aggNode);
extern void del_agg_tlist_references(List *tlist);
extern List *check_having_qual_for_aggs(Node *clause, List *subplanTargetList);
extern List *check_having_qual_for_aggs(Node *clause,
List *subplanTargetList, List *groupClause);
extern List *check_having_qual_for_vars(Node *clause, List *targetlist_so_far);
#endif /* PLANMAIN_H */