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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) 1996-2025, 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"
typedef struct ExplainState ExplainState; /* defined in explain_state.h */
/* Hook for plugins to get control in planner() */
typedef PlannedStmt *(*planner_hook_type) (Query *parse,
const char *query_string,
int cursorOptions,
ParamListInfo boundParams,
ExplainState *es);
extern PGDLLIMPORT planner_hook_type planner_hook;
/* Hook for plugins to get control after PlannerGlobal is initialized */
typedef void (*planner_setup_hook_type) (PlannerGlobal *glob, Query *parse,
const char *query_string,
double *tuple_fraction,
ExplainState *es);
extern PGDLLIMPORT planner_setup_hook_type planner_setup_hook;
/* Hook for plugins to get control before PlannerGlobal is discarded */
typedef void (*planner_shutdown_hook_type) (PlannerGlobal *glob, Query *parse,
const char *query_string,
PlannedStmt *pstmt);
extern PGDLLIMPORT planner_shutdown_hook_type planner_shutdown_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,
ExplainState *es);
extern PlannerInfo *subquery_planner(PlannerGlobal *glob, Query *parse,
char *plan_name,
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);
extern RelOptInfo *create_unique_paths(PlannerInfo *root, RelOptInfo *rel,
SpecialJoinInfo *sjinfo);
extern char *choose_plan_name(PlannerGlobal *glob, const char *name,
bool always_number);
#endif /* PLANNER_H */
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