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/*------------------------------------------------------------------------- * * geqo.h * prototypes for various files in optimizer/geqo * * Portions Copyright (c) 1996-2012, 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 */