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0d49838df6
are declared to return set, and consist of just a single SELECT. We can replace the FROM-item with a sub-SELECT and then optimize much as if we were dealing with a view. Patch from Richard Rowell, cleaned up by me.
60 lines
1.7 KiB
C
60 lines
1.7 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) 1996-2008, 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 1.60 2008/03/18 22:04:14 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 Node *pull_up_IN_clauses(PlannerInfo *root, Node *node);
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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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bool below_outer_join, bool append_rel_member);
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extern void reduce_outer_joins(PlannerInfo *root);
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extern Relids get_relids_in_jointree(Node *jtnode);
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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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extern Relids *adjust_appendrel_attr_needed(RelOptInfo *oldrel,
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AppendRelInfo *appinfo,
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AttrNumber new_min_attr,
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AttrNumber new_max_attr);
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#endif /* PREP_H */
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