Function anl_random_fract

src/backend/utils/misc/sampling.c:344–353

static ReservoirStateData oldrs;

double
anl_random_fract(void)
{
	/* initialize if first time through */
	if (oldrs.randstate[0] == 0)
		sampler_random_init_state(random(), oldrs.randstate);

	/* and compute a random fraction */
	return sampler_random_fract(oldrs.randstate);
}

double
anl_init_selection_state(int n)