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necessarily following the JOIN syntax to develop the query plan. The old behavior is still available by setting GUC variable JOIN_COLLAPSE_LIMIT to 1. Also create a GUC variable FROM_COLLAPSE_LIMIT to control the similar decision about when to collapse sub-SELECT lists into their parent lists. (This behavior existed already, but the limit was always GEQO_THRESHOLD/2; now it's separately adjustable.)
62 lines
1.7 KiB
C
62 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) 1996-2002, 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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* $Id: prep.h,v 1.35 2003/01/25 23:10:30 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/parsenodes.h"
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#include "nodes/plannodes.h"
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/*
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* prototypes for prepjointree.c
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*/
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extern int from_collapse_limit;
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extern int join_collapse_limit;
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extern Node *pull_up_IN_clauses(Query *parse, Node *node);
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extern Node *pull_up_subqueries(Query *parse, Node *jtnode,
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bool below_outer_join);
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extern Node *preprocess_jointree(Query *parse, Node *jtnode);
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extern List *get_relids_in_jointree(Node *jtnode);
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extern List *get_relids_for_join(Query *parse, int joinrelid);
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/*
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* prototypes for prepqual.c
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*/
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extern List *canonicalize_qual(Expr *qual, bool removeAndFlag);
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extern List *cnfify(Expr *qual, bool removeAndFlag);
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/*
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* prototypes for preptlist.c
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*/
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extern List *preprocess_targetlist(List *tlist, int command_type,
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Index result_relation, List *range_table);
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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(Query *parse);
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extern List *find_all_inheritors(Oid parentrel);
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extern List *expand_inherted_rtentry(Query *parse, Index rti,
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bool dup_parent);
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extern Node *adjust_inherited_attrs(Node *node,
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Index old_rt_index, Oid old_relid,
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Index new_rt_index, Oid new_relid);
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extern bool tlist_same_datatypes(List *tlist, List *colTypes, bool junkOK);
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#endif /* PREP_H */
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