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0436679969
we extended the appendrel mechanism to support UNION ALL optimization. The reason nobody noticed was that we are not actually using attr_needed data for appendrel children; hence it seems more reasonable to rip it out than fix it. Back-patch to 8.2 because an Assert failure is possible in corner cases. Per examination of an example from Jim Nasby. In HEAD, also get rid of AppendRelInfo.col_mappings, which is quite inadequate to represent UNION ALL situations; depend entirely on translated_vars instead.
55 lines
1.5 KiB
C
55 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) 1996-2008, 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 1.63 2008/11/11 18:13:32 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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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, 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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