On 2019-05-18 10:49:53 -0700, David G. Johnston wrote:
> On Saturday, May 18, 2019, Peter J. Holzer <hjp-pgsql@hjp.at> wrote:
>
> On 2019-05-16 08:48:51 -0700, David G. Johnston wrote:
> > On Thu, May 16, 2019 at 8:31 AM Daulat Ram <Daulat.Ram@exponential.com>
> wrote:
> >
> >
> > url_hash | bigint | | not null |
> >
> >
> > Change the type of url_hash; make it text instead of bigint.
>
> Or numeric(38, 0). I think it isn't coincidence that he tries to store
> a 38-digit number in it.
>
>
> You don’t perform math on a hash
That's not generally true. Hashes are used for further computation for
example in hash tables or in cryptography.
> thus its not a number
This is just silly. All hash functions I have ever encountered compute a
single fixed size integer from a stream of integers. The result may be
larger than a machine word, in which case the representation in C (or a
similar low level language) may be an array of words (or bytes), but
it's still an integer.
hp
--
_ | Peter J. Holzer | we build much bigger, better disasters now
|_|_) | | because we have much more sophisticated
| | | hjp@hjp.at | management tools.
__/ | http://www.hjp.at/ | -- Ross Anderson <https://www.edge.org/>
