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From Sushanth Sowmyan <>
Subject Re: Selective updates using HCatOutputFormat.setSchema()?
Date Fri, 04 Nov 2011 21:48:46 GMT
Yes, it is possible to do that, and it is intended :) - your table
still has col1 and col3 as part of its schema, and when people read
that table, they will get nulls for col1 and col3.


On Thu, Nov 3, 2011 at 2:57 PM, Francis Christopher Liu
<> wrote:
> Hi,
> I'd like to clarify wether this selective column updates are supported as
> part of HCatOutputFormat.setSchema().
> If I have an unpartitioned table:
> foo(int col1, int col2, int col3)
> Would it be possible for me to just pass column "col2" when calling
> setSchema? For columnar stores (ie Hbase) it would be more efficient just to
> write out the values that we want updated instead of the entire row.
> -Francis

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