| From: | Lacey Powers <lacey(dot)leanne(at)gmail(dot)com> |
|---|---|
| To: | Ravi Kiran <ravi(dot)kolanpaka(at)gmail(dot)com> |
| Cc: | pgsql-novice(at)postgresql(dot)org |
| Subject: | Re: Hash function |
| Date: | 2015-02-21 18:02:37 |
| Message-ID: | CAA7NH1-rGOEeX4mpYqFHmAs74f3o+Ry2P7-nTWehRDzaQwiGMw@mail.gmail.com |
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| Thread: | |
| Lists: | pgsql-novice |
On Jan 11, 2015 6:53 AM, "Ravi Kiran" <ravi(dot)kolanpaka(at)gmail(dot)com> wrote:
>
> Hi,
>
> I want to know what kind of hash function postgres is using currently,
can someone please explain the algorithm postgres is using for the hash
function in the hash join algorithm.
>
> Thanks,
>
> K.Ravikiran
Hello,
I would start by looking here.
http://git.postgresql.org/gitweb/?p=postgresql.git;a=tree;f=src/backend/access/hash;hb=HEAD
hashfunction.c might be of most interest to you. :)
Otherwise, I would ask internals questions like this on -hackers instead of
-novice
Hope that helps :)
Lacey
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