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Any advice about complex Hive tables?
(Follow up to the thread below...)

I have a complex Hive table -- many fields, many nested structs. Hive fails to create the table at all. I can't even start to load data or query the data. Anyone else run into this? It seems to be a showstopper to using Hive for us, which is a shame since everything else about Hive is just what we want.

Any suggestions? Workarounds?

Thanks,
Chuck
________________________________________
From: Connell, Chuck
Sent: Thursday, October 04, 2012 4:31 PM
To: [EMAIL PROTECTED]
Subject: RE: Limit to columns or nesting of Hive table?

The issue apparently is not just the number of levels of nesting. I just created a Hive table with 20 levels of structs within each other. It created fine. This is more levels than the table that was failing for me. The failing table had many more fields throughout the levels.

Chuck

-----Original Message-----
From: Connell, Chuck [mailto:[EMAIL PROTECTED]]
Sent: Thursday, October 04, 2012 12:09 PM
To: [EMAIL PROTECTED]
Subject: RE: Limit to columns or nesting of Hive table?

Thanks. So is the nesting limit 10 now? Does your 2nd paragraph mean that this limit cannot easily be raised?

Chuck

-----Original Message-----
From: Edward Capriolo [mailto:[EMAIL PROTECTED]]
Sent: Thursday, October 04, 2012 11:57 AM
To: [EMAIL PROTECTED]
Subject: Re: Limit to columns or nesting of Hive table?

There is an open jira ticket on this. There is a hard coded limit but it could be raised with some mostly minor code changes.

One of the bigger problems is that hive stores the definition of a column in JDBC "column" and for some databases larger nested structs can case issues.

Edward

On Thu, Oct 4, 2012 at 11:48 AM, Connell, Chuck <[EMAIL PROTECTED]> wrote:
> I am trying to create a large Hive table, with many columns and deeply
> nested structs. It is failing with java.lang.ArrayIndexOutOfBoundsException:
> 10.
>
>
>
> Before I spend a lot of time debugging my table declaration, is there
> some limit here I should know about? Max number of columns? Max depth
> of struct nesting?
>
>
>
> Thanks,
>
> Chuck
>
>