-RE: Does Hive supports EXISTS keyword in select query?
Hezhiqiang 2012-04-11, 14:16
SEMI is only for exist.
Maybe you can try this
Select a.* FROM tblA a left outer JOIN tblB b ON a.field1 = b.field1 where a.field2 is null or b.fild2 is null
From: Philip Tromans [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, April 11, 2012 9:02 PM
To: [EMAIL PROTECTED]
Subject: Re: Does Hive supports EXISTS keyword in select query?
Hive supports EXISTS via SEMI JOIN. Have a look at:
On 11 April 2012 13:59, Bhavesh Shah <[EMAIL PROTECTED]> wrote:
> Hello all,
> I want to query like below in Hive:
> Select a.* FROM tblA a JOIN tblB b ON a.field1 = b.field1
> where (a.field2 is null or not exists(select field2 from tblB where filed2
> is not null)
> But I think Hive doesn't supports EXISTS keyword so how can I overcome this
> Pls suggest me some solution to this. I just got this kind of situation
> where I need to implement some thing like EXISTS/NOT EXISTS
> Thanks and Regards,
> Bhavesh Shah