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Data Bases > Database Theory > Re: Hash Join
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Re: Hash Join

by develop.attitude@[EMAIL PROTECTED] Apr 16, 2008 at 03:13 PM

On Apr 16, 11:21 am, Jason Lepack <jlep...@[EMAIL PROTECTED]
> wrote:
> Sorry, I misunderstood your post.  I found the assignment that you're
> working on (or a similar one), looks interesting.  Remember the
> algorithm for theHashJoin, as can be found by Googling "HashJoin" (and
you should have this in your notes).
>
> Cheers,
> Jason Lepack
>
> On Apr 16, 11:12 am, Jason Lepack <jlep...@[EMAIL PROTECTED]
> wrote:
>
> > Well of course Google comes up with a good first
step:http://en.wikipedia.org/wiki/Hash_join
>
> > On Apr 15, 7:31 pm, develop.attit...@[EMAIL PROTECTED]
 wrote:
>
> > > Hi
>
> > > am doing a project onhashjoin. implementation to be done on hasNext
> > > and getNext interface.
> > >hashjoinhas 2 phases. partitioning phase and probing phase.
>
> > > but i dont understand where the partition will be done. in hasNext
or
> > > getNext interface.
> > > can anyone please help.
>
> > > develop.attitude.

Hi

Thanks for the reply. There are 2 phases in Hash Join..Partition Phase
& Probing Phase.
There are 3 types of algorithms for doing the Hash Join.
1. Grace Join
2. In Memory Join
3. Recursive Hash Join (REFERENCE MSDN).

I am doing the Grace Hash Join.
It has 7 methods.
Most Im****tant being getNext() & hasNext().

Have figured out how partitioning works. I need to know "Which phase
will be in which method"...

Thanks.
 




 4 Posts in Topic:
Hash Join
develop.attitude@[EMAIL P  2008-04-15 16:31:28 
Re: Hash Join
Jason Lepack <jlepack@  2008-04-16 08:12:41 
Re: Hash Join
Jason Lepack <jlepack@  2008-04-16 08:21:04 
Re: Hash Join
develop.attitude@[EMAIL P  2008-04-16 15:13:36 

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