scan a table with 2 column families.

[huaxiang <hu...@asiainfo-linkage.com>]

Hi,

  If a table has two column families, Each stored in a store file in a
region in a regionserver.

  what is process will be a "scan" for "value"s  in these two column
families?

  For example, I want to scan jack's health1:height and health2:weight, each
in a differenet column family.

   First scan height1 in one "store" file, then scan weight in another
"store" file? Then merge these two scan results?

 

 

Thanks!

 

huaxiang

Re: scan a table with 2 column families.

[Doug Meil <do...@explorysmedical.com>]

Hi there, the scan will merge the results between the CFsŠ   for more
information see these two chapters in the HBase RefGuide.

http://hbase.apache.org/book.html#datamodel

http://hbase.apache.org/book.html#mapreduce




On 9/9/12 6:41 AM, "huaxiang" <hu...@asiainfo-linkage.com> wrote:

>Hi,
>
>  If a table has two column families, Each stored in a store file in a
>region in a regionserver.
>
>  what is process will be a "scan" for "value"s  in these two column
>families?
>
>  For example, I want to scan jack's health1:height and health2:weight,
>each
>in a differenet column family.
>
>   First scan height1 in one "store" file, then scan weight in another
>"store" file? Then merge these two scan results?
>
> 
>
> 
>
>Thanks!
>
> 
>
>huaxiang
>