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e549722a8b
making pull_up_sublinks() construct a full-blown JoinExpr tree representation of IN/EXISTS SubLinks that it is able to convert to semi or anti joins. This makes pull_up_sublinks() a shade more complex, but the gain in semantic clarity is worth it. I still have more to do in this area to address the previously-discussed problems, but this commit in itself fixes at least one bug in HEAD, as shown by added regression test case.
34 lines
1.3 KiB
C
34 lines
1.3 KiB
C
/*-------------------------------------------------------------------------
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*
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* subselect.h
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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/subselect.h,v 1.36 2009/02/25 03:30:38 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef SUBSELECT_H
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#define SUBSELECT_H
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#include "nodes/plannodes.h"
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#include "nodes/relation.h"
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extern void SS_process_ctes(PlannerInfo *root);
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extern JoinExpr *convert_ANY_sublink_to_join(PlannerInfo *root,
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SubLink *sublink,
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Relids available_rels);
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extern JoinExpr *convert_EXISTS_sublink_to_join(PlannerInfo *root,
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SubLink *sublink,
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bool under_not,
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Relids available_rels);
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extern Node *SS_replace_correlation_vars(PlannerInfo *root, Node *expr);
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extern Node *SS_process_sublinks(PlannerInfo *root, Node *expr, bool isQual);
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extern void SS_finalize_plan(PlannerInfo *root, Plan *plan,
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bool attach_initplans);
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extern Param *SS_make_initplan_from_plan(PlannerInfo *root, Plan *plan,
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Oid resulttype, int32 resulttypmod);
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extern int SS_assign_worktable_param(PlannerInfo *root);
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#endif /* SUBSELECT_H */
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