91 lines
2.2 KiB
C
91 lines
2.2 KiB
C
/*-------------------------------------------------------------------------
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*
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* geqo.h
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* prototypes for various files in optimizer/geqo
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*
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* Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* src/include/optimizer/geqo.h
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*
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*-------------------------------------------------------------------------
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*/
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/* contributed by:
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=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=
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* Martin Utesch * Institute of Automatic Control *
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= = University of Mining and Technology =
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* utesch@aut.tu-freiberg.de * Freiberg, Germany *
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=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=
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*/
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#ifndef GEQO_H
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#define GEQO_H
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#include "common/pg_prng.h"
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#include "nodes/pathnodes.h"
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#include "optimizer/geqo_gene.h"
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/* GEQO debug flag */
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/*
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#define GEQO_DEBUG
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*/
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/* choose one recombination mechanism here */
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/*
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#define ERX
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#define PMX
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#define CX
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#define PX
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#define OX1
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#define OX2
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*/
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#define ERX
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/*
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* Configuration options
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*
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* If you change these, update backend/utils/misc/postgresql.conf.sample
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*/
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extern PGDLLIMPORT int Geqo_effort; /* 1 .. 10, knob for adjustment of
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* defaults */
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#define DEFAULT_GEQO_EFFORT 5
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#define MIN_GEQO_EFFORT 1
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#define MAX_GEQO_EFFORT 10
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extern PGDLLIMPORT int Geqo_pool_size; /* 2 .. inf, or 0 to use default */
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extern PGDLLIMPORT int Geqo_generations; /* 1 .. inf, or 0 to use default */
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extern PGDLLIMPORT double Geqo_selection_bias;
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#define DEFAULT_GEQO_SELECTION_BIAS 2.0
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#define MIN_GEQO_SELECTION_BIAS 1.5
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#define MAX_GEQO_SELECTION_BIAS 2.0
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extern PGDLLIMPORT double Geqo_seed; /* 0 .. 1 */
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/*
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* Private state for a GEQO run --- accessible via root->join_search_private
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*/
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typedef struct
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{
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List *initial_rels; /* the base relations we are joining */
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pg_prng_state random_state; /* PRNG state */
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} GeqoPrivateData;
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/* routines in geqo_main.c */
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extern RelOptInfo *geqo(PlannerInfo *root,
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int number_of_rels, List *initial_rels);
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/* routines in geqo_eval.c */
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extern Cost geqo_eval(PlannerInfo *root, Gene *tour, int num_gene);
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extern RelOptInfo *gimme_tree(PlannerInfo *root, Gene *tour, int num_gene);
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#endif /* GEQO_H */
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