Re: bigint out of range

[Ron <ronljohnsonjr@xxxxxxxxx>]

On 5/18/19 2:27 PM, Peter J. Holzer wrote:
> On 2019-05-18 10:49:53 -0700, David G. Johnston wrote:
> > On Saturday, May 18, 2019, Peter J. Holzer <hjp-pgsql@xxxxxx> 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@xxxxxxxxxxxxxxx>
> >      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.

How is it "using math" to use a hash key in a hash lookup table?

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