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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 12:19:15 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 12:19:15 +0000 |
commit | 6eb9c5a5657d1fe77b55cc261450f3538d35a94d (patch) | |
tree | 657d8194422a5daccecfd42d654b8a245ef7b4c8 /src/include/optimizer/geqo.h | |
parent | Initial commit. (diff) | |
download | postgresql-13-6eb9c5a5657d1fe77b55cc261450f3538d35a94d.tar.xz postgresql-13-6eb9c5a5657d1fe77b55cc261450f3538d35a94d.zip |
Adding upstream version 13.4.upstream/13.4upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/include/optimizer/geqo.h')
-rw-r--r-- | src/include/optimizer/geqo.h | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/src/include/optimizer/geqo.h b/src/include/optimizer/geqo.h new file mode 100644 index 0000000..aba549f --- /dev/null +++ b/src/include/optimizer/geqo.h @@ -0,0 +1,88 @@ +/*------------------------------------------------------------------------- + * + * geqo.h + * prototypes for various files in optimizer/geqo + * + * Portions Copyright (c) 1996-2020, 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/pathnodes.h" +#include "optimizer/geqo_gene.h" + + +/* GEQO debug flag */ +/* + #define GEQO_DEBUG + */ + +/* choose one recombination mechanism here */ +/* + #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 */ |