diff options
| author | Tom Lane <tgl@sss.pgh.pa.us> | 2000-10-05 19:11:39 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2000-10-05 19:11:39 +0000 |
| commit | 05e3d0ee8666b74f11ffad16f46e372459d6e53e (patch) | |
| tree | b273892bfda60f6bad315e84aaa2e9826e226931 /src/include/optimizer/planmain.h | |
| parent | 5292637f52c6db8a22f99177f228273cb69fc510 (diff) | |
Reimplementation of UNION/INTERSECT/EXCEPT. INTERSECT/EXCEPT now meet the
SQL92 semantics, including support for ALL option. All three can be used
in subqueries and views. DISTINCT and ORDER BY work now in views, too.
This rewrite fixes many problems with cross-datatype UNIONs and INSERT/SELECT
where the SELECT yields different datatypes than the INSERT needs. I did
that by making UNION subqueries and SELECT in INSERT be treated like
subselects-in-FROM, thereby allowing an extra level of targetlist where the
datatype conversions can be inserted safely.
INITDB NEEDED!
Diffstat (limited to 'src/include/optimizer/planmain.h')
| -rw-r--r-- | src/include/optimizer/planmain.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/src/include/optimizer/planmain.h b/src/include/optimizer/planmain.h index e46d0bdbd84..015590a5ee2 100644 --- a/src/include/optimizer/planmain.h +++ b/src/include/optimizer/planmain.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2000, PostgreSQL, Inc * Portions Copyright (c) 1994, Regents of the University of California * - * $Id: planmain.h,v 1.45 2000/09/29 18:21:40 tgl Exp $ + * $Id: planmain.h,v 1.46 2000/10/05 19:11:37 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -26,6 +26,8 @@ extern Plan *query_planner(Query *root, List *tlist, double tuple_fraction); * prototypes for plan/createplan.c */ extern Plan *create_plan(Query *root, Path *best_path); +extern SubqueryScan *make_subqueryscan(List *qptlist, List *qpqual, + Index scanrelid, Plan *subplan); extern Sort *make_sort(List *tlist, Plan *lefttree, int keycount); extern Sort *make_sort_from_pathkeys(List *tlist, Plan *lefttree, List *pathkeys); @@ -34,7 +36,10 @@ extern Group *make_group(List *tlist, bool tuplePerGroup, int ngrp, AttrNumber *grpColIdx, Plan *lefttree); extern Material *make_material(List *tlist, Plan *lefttree); extern Unique *make_unique(List *tlist, Plan *lefttree, List *distinctList); +extern SetOp *make_setop(SetOpCmd cmd, List *tlist, Plan *lefttree, + List *distinctList, AttrNumber flagColIdx); extern Result *make_result(List *tlist, Node *resconstantqual, Plan *subplan); +extern void copy_plan_costsize(Plan *dest, Plan *src); /* * prototypes for plan/initsplan.c |