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Subselects...

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This commit is contained in:
Vadim B. Mikheev
1998-02-13 03:46:56 +00:00
parent 6fcf2d7cb3
commit 5d7923dd1c
11 changed files with 63 additions and 10 deletions
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6
src/include/optimizer/clauses.h
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@@ -6,7 +6,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: clauses.h,v 1.8 1998/01/24 22:49:39 momjian Exp $
* $Id: clauses.h,v 1.9 1998/02/13 03:46:54 vadim Exp $
*
*-------------------------------------------------------------------------
*/
@@ -48,4 +48,8 @@ extern void get_rels_atts(Node *clause, int *relid1,
AttrNumber *attno1, int *relid2, AttrNumber *attno2);
extern void CommuteClause(Node *clause);
#define is_subplan(clause) ((Node*) clause != NULL && \
nodeTag((Node*) clause) == T_Expr && \
((Expr *) clause)->opType == SUBPLAN_EXPR)
#endif /* CLAUSES_H */

3
src/include/optimizer/planner.h
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@@ -6,7 +6,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: planner.h,v 1.7 1997/11/26 01:13:49 momjian Exp $
* $Id: planner.h,v 1.8 1998/02/13 03:46:56 vadim Exp $
*
*-------------------------------------------------------------------------
*/
@@ -21,6 +21,7 @@
#include "parser/parse_node.h"
extern Plan *planner(Query *parse);
extern Plan *union_planner(Query *parse);
extern void pg_checkretval(Oid rettype, QueryTreeList *querytree_list);
#endif /* PLANNER_H */

20
src/include/optimizer/subselect.h Normal file
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@@ -0,0 +1,20 @@
/*-------------------------------------------------------------------------
*
* subselect.h--
*
*-------------------------------------------------------------------------
*/
#ifndef SUBSELECT_H
#define SUBSELECT_H
extern int PlannerQueryLevel; /* level of current query */
extern List *PlannerVarParam; /* correlation Vars to Param mapper */
extern List *PlannerParamVar; /* to get Var from Param->paramid */
extern List *PlannerInitPlan; /* init subplans for current query */
extern int PlannerPlanId; /* to assigne unique ID to subquery plans */
extern List *SS_finalize_plan (Plan *plan);
extern Node *SS_replace_correlation_vars (Node *expr);
extern Node *SS_process_sublinks (Node *expr);
#endif /* SUBSELECT_H */