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/*-------------------------------------------------------------------------
*
* xfunc.h--
* prototypes for xfunc.c and predmig.c.
*
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: xfunc.h,v 1.1.1.1 1996/07/09 06:21:35 scrappy Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef XFUNC_H
#define XFUNC_H
#include "nodes/relation.h"
/* command line arg flags */
#define XFUNC_OFF -1 /* do no optimization of expensive preds */
#define XFUNC_NOR 2 /* do no optimization of OR clauses */
#define XFUNC_NOPULL 4 /* never pull restrictions above joins */
#define XFUNC_NOPM 8 /* don't do predicate migration */
#define XFUNC_WAIT 16 /* don't do pullup until predicate migration */
#define XFUNC_PULLALL 32 /* pull all expensive restrictions up, always */
/* constants for local and join predicates */
#define XFUNC_LOCPRD 1
#define XFUNC_JOINPRD 2
#define XFUNC_UNKNOWN 0
extern int XfuncMode; /* defined in tcop/postgres.c */
/* defaults for function attributes used for expensive function calculations */
#define BYTE_PCT 100
#define PERBYTE_CPU 0
#define PERCALL_CPU 0
#define OUTIN_RATIO 100
/* default width assumed for variable length attributes */
#define VARLEN_DEFAULT 128;
/* Macro to get group rank out of group cost and group sel */
#define get_grouprank(a) ((get_groupsel(a) - 1) / get_groupcost(a))
/* Macro to see if a path node is actually a Join */
#define is_join(pathnode) (length(get_relids(get_parent(pathnode))) > 1 ? 1 : 0)
/* function prototypes from planner/path/xfunc.c */
extern void xfunc_trypullup(Rel *rel);
extern int xfunc_shouldpull(Path *childpath, JoinPath *parentpath,
int whichchild, CInfo *maxcinfopt);
extern CInfo *xfunc_pullup(Path *childpath, JoinPath *parentpath, CInfo *cinfo,
int whichchild, int clausetype);
extern Cost xfunc_rank(Expr *clause);
extern Cost xfunc_expense(Query* queryInfo, Expr *clause);
extern Cost xfunc_join_expense(JoinPath *path, int whichchild);
extern Cost xfunc_local_expense(Expr *clause);
extern Cost xfunc_func_expense(Expr *node, List *args);
extern int xfunc_width(Expr *clause);
/* static, moved to xfunc.c */
/* extern int xfunc_card_unreferenced(Expr *clause, Relid referenced); */
extern int xfunc_card_product(Relid relids);
extern List *xfunc_find_references(List *clause);
extern List *xfunc_primary_join(JoinPath *pathnode);
extern Cost xfunc_get_path_cost(Path *pathnode);
extern Cost xfunc_total_path_cost(JoinPath *pathnode);
extern Cost xfunc_expense_per_tuple(JoinPath *joinnode, int whichchild);
extern void xfunc_fixvars(Expr *clause, Rel *rel, int varno);
extern int xfunc_cinfo_compare(void *arg1, void *arg2);
extern int xfunc_clause_compare(void *arg1, void *arg2);
extern void xfunc_disjunct_sort(List *clause_list);
extern int xfunc_disjunct_compare(void *arg1, void *arg2);
extern int xfunc_func_width(RegProcedure funcid, List *args);
extern int xfunc_tuple_width(Relation rd);
extern int xfunc_num_join_clauses(JoinPath *path);
extern List *xfunc_LispRemove(List *foo, List *bar);
extern bool xfunc_copyrel(Rel *from, Rel **to);
/*
* function prototypes for path/predmig.c
*/
extern bool xfunc_do_predmig(Path root);
#endif /* XFUNC_H */
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