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8ec569479f
Up until now, we've had a policy of only marking certain variables in the PostgreSQL header files with PGDLLIMPORT, but now we've decided to mark them all. This means that extensions running on Windows should no longer operate at a disadvantage as compared to extensions running on Linux: if the variable is present in a header file, it should be accessible. Discussion: http://postgr.es/m/CA+TgmoYanc1_FSfimhgiWSqVyP5KKmh5NP2BWNwDhO8Pg2vGYQ@mail.gmail.com
90 lines
2.2 KiB
C
90 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) 1996-2022, 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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