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c59d8dd44d
PlaceHolderVar nodes in join quals appearing in or below the lowest outer join that could null the subquery being pulled up. This improves the planner's ability to recognize constant join quals, and probably helps with detection of common sort keys (equivalence classes) as well.
56 lines
1.5 KiB
C
56 lines
1.5 KiB
C
/*-------------------------------------------------------------------------
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*
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* prep.h
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* prototypes for files in optimizer/prep/
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*
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*
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* Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $PostgreSQL: pgsql/src/include/optimizer/prep.h,v 1.65 2009/04/28 21:31:16 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef PREP_H
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#define PREP_H
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#include "nodes/plannodes.h"
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#include "nodes/relation.h"
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/*
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* prototypes for prepjointree.c
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*/
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extern void pull_up_sublinks(PlannerInfo *root);
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extern void inline_set_returning_functions(PlannerInfo *root);
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extern Node *pull_up_subqueries(PlannerInfo *root, Node *jtnode,
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JoinExpr *lowest_outer_join,
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AppendRelInfo *containing_appendrel);
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extern void reduce_outer_joins(PlannerInfo *root);
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extern Relids get_relids_in_jointree(Node *jtnode, bool include_joins);
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extern Relids get_relids_for_join(PlannerInfo *root, int joinrelid);
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/*
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* prototypes for prepqual.c
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*/
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extern Expr *canonicalize_qual(Expr *qual);
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/*
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* prototypes for preptlist.c
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*/
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extern List *preprocess_targetlist(PlannerInfo *root, List *tlist);
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/*
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* prototypes for prepunion.c
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*/
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extern Plan *plan_set_operations(PlannerInfo *root, double tuple_fraction,
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List **sortClauses);
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extern List *find_all_inheritors(Oid parentrel);
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extern void expand_inherited_tables(PlannerInfo *root);
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extern Node *adjust_appendrel_attrs(Node *node, AppendRelInfo *appinfo);
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#endif /* PREP_H */
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