| Server IP : 85.214.239.14 / Your IP : 3.144.15.18 Web Server : Apache/2.4.62 (Debian) System : Linux h2886529.stratoserver.net 4.9.0 #1 SMP Tue Jan 9 19:45:01 MSK 2024 x86_64 User : www-data ( 33) PHP Version : 7.4.18 Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals,pcntl_unshare, MySQL : OFF | cURL : OFF | WGET : ON | Perl : ON | Python : ON | Sudo : ON | Pkexec : OFF Directory : /proc/3/root/usr/include/postgresql/9.6/server/optimizer/ |
Upload File : |
/*-------------------------------------------------------------------------
*
* geqo.h
* prototypes for various files in optimizer/geqo
*
* Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/optimizer/geqo.h
*
*-------------------------------------------------------------------------
*/
/* 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.conf.sample
*/
extern int Geqo_effort; /* 1 .. 10, knob for adjustment of defaults */
#define DEFAULT_GEQO_EFFORT 5
#define MIN_GEQO_EFFORT 1
#define MAX_GEQO_EFFORT 10
extern int Geqo_pool_size; /* 2 .. inf, or 0 to use default */
extern int Geqo_generations; /* 1 .. inf, or 0 to use default */
extern double Geqo_selection_bias;
#define DEFAULT_GEQO_SELECTION_BIAS 2.0
#define MIN_GEQO_SELECTION_BIAS 1.5
#define MAX_GEQO_SELECTION_BIAS 2.0
extern double Geqo_seed; /* 0 .. 1 */
/*
* Private state for a GEQO run --- accessible via root->join_search_private
*/
typedef struct
{
List *initial_rels; /* the base relations we are joining */
unsigned short random_state[3]; /* state for pg_erand48() */
} GeqoPrivateData;
/* routines in geqo_main.c */
extern RelOptInfo *geqo(PlannerInfo *root,
int number_of_rels, List *initial_rels);
/* routines in geqo_eval.c */
extern Cost geqo_eval(PlannerInfo *root, Gene *tour, int num_gene);
extern RelOptInfo *gimme_tree(PlannerInfo *root, Gene *tour, int num_gene);
#endif /* GEQO_H */