Hello Fabien,
25/12/2017 19:17, Fabien COELHO пишет:
>
>>> However, the key can be used if controlled so that different values do
>>> not have the same randomization in different part of the script, so as
>>> to avoid using the same patterns for different things if not desirable.
>>
>> Original murmur algorithm accepts seed as a parameter, which can be used
>> for this purpose. I used value itself as a seed in the patch, but I can
>> turn it into a function argument.
>
> Hmmm. Possibly. However it needs a default, something like
>
> x = hash(v[, key])
>
> with key some pseudo-random value?
>
Sorry for a long delay. I've added hash() function which is just an
alias for murmur2. I've also utilized variable arguments feature from
least()/greates() functions to make optional seed parameter, but I
consider this as a hack. Should we probably add some infrastructure for
optional arguments? Docs and tests are on their way.
Thanks!
--
Ildar Musin
Postgres Professional: http://www.postgrespro.com
Russian Postgres Company
