Function sampler_random_fract

src/backend/utils/misc/sampling.c:320–331

Select a random value R uniformly distributed in (0 - 1) */

/* Select a random value R uniformly distributed in (0 - 1) */
double
sampler_random_fract(SamplerRandomState 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;
}


/*