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5db2e83852
really ought to run before canonicalize_qual, because it can now produce forms that canonicalize_qual knows how to improve (eg, NOT clauses). Also, because eval_const_expressions already knows about flattening nested ANDs and ORs into N-argument form, the initial flatten_andors pass in canonicalize_qual is now completely redundant and can be removed. This doesn't save a whole lot of code, but the time and palloc traffic eliminated is a useful gain on large expression trees.
60 lines
1.6 KiB
C
60 lines
1.6 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) 1996-2005, 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 1.49 2005/03/28 00:58:26 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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#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 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 void reduce_outer_joins(Query *parse);
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extern Node *simplify_jointree(Query *parse, Node *jtnode);
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extern Relids get_relids_in_jointree(Node *jtnode);
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extern Relids 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 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(Query *parse, 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(Query *parse, List **sortClauses);
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extern List *find_all_inheritors(Oid parentrel);
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extern List *expand_inherited_rtentry(Query *parse, Index rti);
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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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#endif /* PREP_H */
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