Re: WTF with hash index?

On 11/13/2018 12:07 PM, Andreas Kretschmer wrote:
>
>
> Am 13.11.2018 um 17:42 schrieb Олег Самойлов:
>> insert into gender (gender) select case when random<0.50 then 'female' 
>> when random<0.99 then 'male' else 'other' end from (select random() as 
>> random, generate_series(1,:table_size)) as subselect;
>
> is that really your intended data distibution? 99% male?

select case when random<0.50 then 'female'
when random<0.99 then 'male'
             else 'other' end
from (select random() as random, generate_series(1,:table_size)) as subselect;

Shouldn't that make 49% male?

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