diff options
| author | Dean Rasheed | 2024-03-27 10:12:39 +0000 |
|---|---|---|
| committer | Dean Rasheed | 2024-03-27 10:12:39 +0000 |
| commit | e6341323a8da64b18e9af3e75a4578230702d61c (patch) | |
| tree | f04f8e7fa84af4b569e58c85d2a7d98f65f45303 /src/include/common | |
| parent | 818861eb578663a0d4d8d7dc4e18c96a148b3c75 (diff) | |
Add functions to generate random numbers in a specified range.
This adds 3 new variants of the random() function:
random(min integer, max integer) returns integer
random(min bigint, max bigint) returns bigint
random(min numeric, max numeric) returns numeric
Each returns a random number x in the range min <= x <= max.
For the numeric function, the number of digits after the decimal point
is equal to the number of digits that "min" or "max" has after the
decimal point, whichever has more.
The main entry points for these functions are in a new C source file.
The existing random(), random_normal(), and setseed() functions are
moved there too, so that they can all share the same PRNG state, which
is kept private to that file.
Dean Rasheed, reviewed by Jian He, David Zhang, Aleksander Alekseev,
and Tomas Vondra.
Discussion: https://postgr.es/m/CAEZATCV89Vxuq93xQdmc0t-0Y2zeeNQTdsjbmV7dyFBPykbV4Q@mail.gmail.com
Diffstat (limited to 'src/include/common')
| -rw-r--r-- | src/include/common/pg_prng.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/include/common/pg_prng.h b/src/include/common/pg_prng.h index e201b95686c..c114c6419d0 100644 --- a/src/include/common/pg_prng.h +++ b/src/include/common/pg_prng.h @@ -51,6 +51,7 @@ extern uint64 pg_prng_uint64(pg_prng_state *state); extern uint64 pg_prng_uint64_range(pg_prng_state *state, uint64 rmin, uint64 rmax); extern int64 pg_prng_int64(pg_prng_state *state); extern int64 pg_prng_int64p(pg_prng_state *state); +extern int64 pg_prng_int64_range(pg_prng_state *state, int64 rmin, int64 rmax); extern uint32 pg_prng_uint32(pg_prng_state *state); extern int32 pg_prng_int32(pg_prng_state *state); extern int32 pg_prng_int32p(pg_prng_state *state); |