PostgreSQL Source Code: src/backend/utils/adt/pseudorandomfuncs.c File Reference (original) (raw)

#include "[postgres.h](postgres%5F8h%5Fsource.html)"
#include <math.h>
#include "[common/pg_prng.h](pg%5F%5Fprng%5F8h%5Fsource.html)"
#include "[miscadmin.h](miscadmin%5F8h%5Fsource.html)"
#include "[utils/date.h](date%5F8h%5Fsource.html)"
#include "utils/fmgrprotos.h"
#include "[utils/numeric.h](numeric%5F8h%5Fsource.html)"
#include "[utils/timestamp.h](utils%5F2timestamp%5F8h%5Fsource.html)"

Go to the source code of this file.

◆ CHECK_RANGE_BOUNDS

| #define CHECK_RANGE_BOUNDS | ( | | rmin, | | ---------------------------- | - | | ----- | | | rmax | | | | | ) | | | |

Value:

do { \

if ((rmin) > (rmax)) \

errcode(ERRCODE_INVALID_PARAMETER_VALUE), \

errmsg("lower bound must be less than or equal to upper bound")); \

} while (0)

int errcode(int sqlerrcode)

int errmsg(const char *fmt,...)

Definition at line 33 of file pseudorandomfuncs.c.

◆ date_random()

Definition at line 203 of file pseudorandomfuncs.c.

204{

208

210

213 errcode(ERRCODE_INVALID_PARAMETER_VALUE),

214 errmsg("lower and upper bounds must be finite"));

215

217

219

221}

#define PG_RETURN_DATEADT(x)

#define DATE_IS_NOBEGIN(j)

#define PG_GETARG_DATEADT(n)

#define ereport(elevel,...)

int64 pg_prng_int64_range(pg_prng_state *state, int64 rmin, int64 rmax)

static void initialize_prng(void)

static pg_prng_state prng_state

#define CHECK_RANGE_BOUNDS(rmin, rmax)

References CHECK_RANGE_BOUNDS, DATE_IS_NOBEGIN, DATE_IS_NOEND, ereport, errcode(), errmsg(), ERROR, initialize_prng(), PG_GETARG_DATEADT, pg_prng_int64_range(), PG_RETURN_DATEADT, and prng_state.

◆ drandom()

◆ drandom_normal()

◆ initialize_prng()

Definition at line 47 of file pseudorandomfuncs.c.

48{

50 {

51

52

53

54

55

57 {

60

61

64 }

66 }

67}

TimestampTz GetCurrentTimestamp(void)

Datum now(PG_FUNCTION_ARGS)

void pg_prng_seed(pg_prng_state *state, uint64 seed)

#define pg_prng_strong_seed(state)

static bool prng_seed_set

References GetCurrentTimestamp(), MyProcPid, now(), pg_prng_seed(), pg_prng_strong_seed, prng_seed_set, prng_state, and unlikely.

Referenced by date_random(), drandom(), drandom_normal(), int4random(), int8random(), numeric_random(), timestamp_random(), and timestamptz_random().

◆ int4random()

◆ int8random()

◆ numeric_random()

◆ setseed()

Definition at line 75 of file pseudorandomfuncs.c.

76{

78

79 if (seed < -1 || seed > 1 || isnan(seed))

81 errcode(ERRCODE_INVALID_PARAMETER_VALUE),

82 errmsg("setseed parameter %g is out of allowed range [-1,1]",

83 seed));

84

87

89}

void pg_prng_fseed(pg_prng_state *state, double fseed)

References ereport, errcode(), errmsg(), ERROR, PG_GETARG_FLOAT8, pg_prng_fseed(), PG_RETURN_VOID, prng_seed_set, and prng_state.

Referenced by assign_random_seed().

◆ timestamp_random()

Definition at line 229 of file pseudorandomfuncs.c.

230{

234

236

239 errcode(ERRCODE_INVALID_PARAMETER_VALUE),

240 errmsg("lower and upper bounds must be finite"));

241

243

245

247}

#define TIMESTAMP_IS_NOEND(j)

#define TIMESTAMP_IS_NOBEGIN(j)

#define PG_GETARG_TIMESTAMP(n)

#define PG_RETURN_TIMESTAMP(x)

References CHECK_RANGE_BOUNDS, ereport, errcode(), errmsg(), ERROR, initialize_prng(), PG_GETARG_TIMESTAMP, pg_prng_int64_range(), PG_RETURN_TIMESTAMP, prng_state, TIMESTAMP_IS_NOBEGIN, and TIMESTAMP_IS_NOEND.

◆ timestamptz_random()

Definition at line 255 of file pseudorandomfuncs.c.

256{

260

262

265 errcode(ERRCODE_INVALID_PARAMETER_VALUE),

266 errmsg("lower and upper bounds must be finite"));

267

269

271

273}

#define PG_GETARG_TIMESTAMPTZ(n)

#define PG_RETURN_TIMESTAMPTZ(x)

References CHECK_RANGE_BOUNDS, ereport, errcode(), errmsg(), ERROR, initialize_prng(), PG_GETARG_TIMESTAMPTZ, pg_prng_int64_range(), PG_RETURN_TIMESTAMPTZ, prng_state, TIMESTAMP_IS_NOBEGIN, and TIMESTAMP_IS_NOEND.

◆ prng_seed_set

◆ prng_state

Definition at line 26 of file pseudorandomfuncs.c.

Referenced by choose_dsm_implementation(), date_random(), drandom(), drandom_normal(), initialize_prng(), int4random(), int8random(), numeric_random(), setseed(), timestamp_random(), and timestamptz_random().