planner.h

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/*-------------------------------------------------------------------------
 *
 * planner.h
 *    prototypes for planner.c.
 *
 * Note that the primary entry points for planner.c are declared in
 * optimizer/optimizer.h, because they're intended to be called from
 * non-planner code.  Declarations here are meant for use by other
 * planner modules.
 *
 * Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/optimizer/planner.h
 *
 *-------------------------------------------------------------------------
 */
#ifndef PLANNER_H
#define PLANNER_H
 
#include "nodes/pathnodes.h"
#include "nodes/plannodes.h"
 
 
/* Hook for plugins to get control in planner() */
typedef PlannedStmt *(*planner_hook_type) (Query *parse,
                                           const char *query_string,
                                           int cursorOptions,
                                           ParamListInfo boundParams);
extern PGDLLIMPORT planner_hook_type planner_hook;
 
/* Hook for plugins to get control when grouping_planner() plans upper rels */
typedef void (*create_upper_paths_hook_type) (PlannerInfo *root,
                                              UpperRelationKind stage,
                                              RelOptInfo *input_rel,
                                              RelOptInfo *output_rel,
                                              void *extra);
extern PGDLLIMPORT create_upper_paths_hook_type create_upper_paths_hook;
 
 
extern PlannedStmt *standard_planner(Query *parse, const char *query_string,
                                     int cursorOptions,
                                     ParamListInfo boundParams);
 
extern PlannerInfo *subquery_planner(PlannerGlobal *glob, Query *parse,
                                     PlannerInfo *parent_root,
                                     bool hasRecursion, double tuple_fraction,
                                     SetOperationStmt *setops);
 
extern RowMarkType select_rowmark_type(RangeTblEntry *rte,
                                       LockClauseStrength strength);
 
extern bool limit_needed(Query *parse);
 
extern void mark_partial_aggref(Aggref *agg, AggSplit aggsplit);
 
extern Path *get_cheapest_fractional_path(RelOptInfo *rel,
                                          double tuple_fraction);
 
extern Expr *preprocess_phv_expression(PlannerInfo *root, Expr *expr);
 
#endif                          /* PLANNER_H */