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Diffstat (limited to 'src/backend/utils/misc/sampling.c')
| -rw-r--r-- | src/backend/utils/misc/sampling.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/src/backend/utils/misc/sampling.c b/src/backend/utils/misc/sampling.c index aaf1d6c4108..6191f797344 100644 --- a/src/backend/utils/misc/sampling.c +++ b/src/backend/utils/misc/sampling.c @@ -237,7 +237,14 @@ sampler_random_init_state(long seed, SamplerRandomState randstate) double sampler_random_fract(SamplerRandomState randstate) { - return pg_erand48(randstate); + double res; + + /* pg_erand48 returns a value in [0.0 - 1.0), so we must reject 0 */ + do + { + res = pg_erand48(randstate); + } while (res == 0.0); + return res; } |