subselect.h

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/*-------------------------------------------------------------------------
 *
 * subselect.h
 *    Planning routines for subselects.
 *
 * Portions Copyright (c) 1996-2026, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/optimizer/subselect.h
 *
 *-------------------------------------------------------------------------
 */
#ifndef SUBSELECT_H
#define SUBSELECT_H
 
#include "nodes/pathnodes.h"
#include "nodes/plannodes.h"
 
extern void SS_process_ctes(PlannerInfo *root);
extern ScalarArrayOpExpr *convert_VALUES_to_ANY(PlannerInfo *root,
                                                Node *testexpr,
                                                Query *values);
extern JoinExpr *convert_ANY_sublink_to_join(PlannerInfo *root,
                                             SubLink *sublink,
                                             Relids available_rels);
extern JoinExpr *convert_EXISTS_sublink_to_join(PlannerInfo *root,
                                                SubLink *sublink,
                                                bool under_not,
                                                Relids available_rels);
extern Node *SS_replace_correlation_vars(PlannerInfo *root, Node *expr);
extern Node *SS_process_sublinks(PlannerInfo *root, Node *expr, bool isQual);
extern void SS_identify_outer_params(PlannerInfo *root);
extern void SS_charge_for_initplans(PlannerInfo *root, RelOptInfo *final_rel);
extern void SS_compute_initplan_cost(List *init_plans,
                                     Cost *initplan_cost_p,
                                     bool *unsafe_initplans_p);
extern void SS_attach_initplans(PlannerInfo *root, Plan *plan);
extern void SS_finalize_plan(PlannerInfo *root, Plan *plan);
extern Param *SS_make_initplan_output_param(PlannerInfo *root,
                                            Oid resulttype, int32 resulttypmod,
                                            Oid resultcollation);
extern void SS_make_initplan_from_plan(PlannerInfo *root,
                                       PlannerInfo *subroot, Plan *plan,
                                       Param *prm);
 
#endif                          /* SUBSELECT_H */