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Posted to user@pig.apache.org by 勇胡 <yo...@gmail.com> on 2011/07/19 11:41:42 UTC

The nested depth?

Hello,

I know that pig can support nested data. I want to know that how many nested
depth pig can support, infinite nested or there exists a limitation?

Thanks!

Yong

Re: The nested depth?

Posted by Thejas Nair <th...@hortonworks.com>.

Hi Yong,
There is no limitation on the levels of nesting that you can have in 
your data.
Pig has nested-foreach which lets you manipulate bags directly as if it 
were a relation. But that works only for one level. There are plans to 
extend that.
You can always process data with any levels of nesting in a udf or 
load/store function, or use flatten to un-nest data.

-Thejas

On 7/19/11 2:41 AM, 勇胡 wrote:
> Hello,
>
> I know that pig can support nested data. I want to know that how many nested
> depth pig can support, infinite nested or there exists a limitation?
>
> Thanks!
>
> Yong
>