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geqo_random.h File Reference

#include "optimizer/geqo.h"

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Functions

void geqo_set_seed (PlannerInfo *root, double seed)

double geqo_rand (PlannerInfo *root)

int geqo_randint (PlannerInfo *root, int upper, int lower)

Function Documentation

◆ geqo_rand()

double geqo_rand ( PlannerInfo * root )

Definition at line 28 of file geqo_random.c.

29{

30 GeqoPrivateData *private = (GeqoPrivateData *) root->join_search_private;

31

32 return pg_prng_double(&private->random_state);

33}

pg_prng_double

double pg_prng_double(pg_prng_state *state)

Definition: pg_prng.c:268

root

tree ctl root

Definition: radixtree.h:1857

GeqoPrivateData

Definition: geqo.h:76

References pg_prng_double(), and root.

Referenced by linear_rand().

◆ geqo_randint()

int geqo_randint ( PlannerInfo * root,

int upper,

int lower

)

Definition at line 36 of file geqo_random.c.

37{

38 GeqoPrivateData *private = (GeqoPrivateData *) root->join_search_private;

39

40 /*

41 * In current usage, "lower" is never negative so we can just use

42 * pg_prng_uint64_range directly.

43 */

44 return (int) pg_prng_uint64_range(&private->random_state, lower, upper);

45}

lower

Datum lower(PG_FUNCTION_ARGS)

Definition: oracle_compat.c:49

upper

Datum upper(PG_FUNCTION_ARGS)

Definition: oracle_compat.c:80

pg_prng_uint64_range

uint64 pg_prng_uint64_range(pg_prng_state *state, uint64 rmin, uint64 rmax)

Definition: pg_prng.c:144

References lower(), pg_prng_uint64_range(), root, and upper().

Referenced by edge_failure(), gimme_gene(), gimme_tour(), and init_tour().

◆ geqo_set_seed()

void geqo_set_seed ( PlannerInfo * root,

double seed

)

Definition at line 20 of file geqo_random.c.

21{

22 GeqoPrivateData *private = (GeqoPrivateData *) root->join_search_private;

23

24 pg_prng_fseed(&private->random_state, seed);

25}

pg_prng_fseed

void pg_prng_fseed(pg_prng_state *state, double fseed)

Definition: pg_prng.c:102

References pg_prng_fseed(), and root.

Referenced by geqo().