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/*-------------------------------------------------------------------------
*
* geqo.h
* prototypes for various files in optimizer/geqo
*
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: geqo.h,v 1.26 2001/10/28 06:26:07 momjian Exp $
*
*-------------------------------------------------------------------------
*/
/* contributed by:
=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=
* Martin Utesch * Institute of Automatic Control *
= = University of Mining and Technology =
* utesch@aut.tu-freiberg.de * Freiberg, Germany *
=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=
*/
#ifndef GEQO_H
#define GEQO_H
#include "nodes/relation.h"
#include "optimizer/geqo_gene.h"
/* GEQO debug flag */
/*
#define GEQO_DEBUG
*/
/* recombination mechanism */
/*
#define ERX
#define PMX
#define CX
#define PX
#define OX1
#define OX2
*/
#define ERX
/*
* Configuration options
*/
/* If you change these, update backend/utils/misc/postgresql.sample.conf */
extern int Geqo_pool_size;
#define DEFAULT_GEQO_POOL_SIZE 0 /* = default based on no. of relations. */
#define MIN_GEQO_POOL_SIZE 128
#define MAX_GEQO_POOL_SIZE 1024
extern int Geqo_effort; /* 1 .. inf, only used to calculate
* generations default */
extern int Geqo_generations; /* 1 .. inf, or 0 to use default based on
* pool size */
extern double Geqo_selection_bias;
/* If you change these, update backend/utils/misc/postgresql.sample.conf */
#define DEFAULT_GEQO_SELECTION_BIAS 2.0
#define MIN_GEQO_SELECTION_BIAS 1.5
#define MAX_GEQO_SELECTION_BIAS 2.0
extern int Geqo_random_seed; /* or negative to use current time */
/* routines in geqo_main.c */
extern RelOptInfo *geqo(Query *root, int number_of_rels, List *initial_rels);
/* routines in geqo_eval.c */
extern Cost geqo_eval(Query *root, List *initial_rels,
Gene *tour, int num_gene);
extern RelOptInfo *gimme_tree(Query *root, List *initial_rels,
Gene *tour, int num_gene,
int rel_count, RelOptInfo *old_rel);
#endif /* GEQO_H */
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