You are viewing a plain text version of this content. The canonical link for it is here.

Posted to user@hbase.apache.org by Sindy <si...@gmail.com> on 2011/03/20 15:11:58 UTC

Scan with filter

Hi,
I have a question about Scan.

 *Scan s = new Scan();
 s.setFilter(f);
 ResultScanner scanner = _table.getScanner(s); *

I want to know the operation about filter was done at server-side  or
client-side?

the data was sent back to client-side before filtering or the data was
filtered then sent to client ?


Thanks
-- 
Sindy

Re: Scan with filter

Posted by Pete Haidinyak <ja...@cox.net>.

One gotcha I found was you have to include the column you're going to  
filter on in the columns you're going to return.

-Pete

On Sun, 20 Mar 2011 07:25:14 -0700, Ted Yu <yu...@gmail.com> wrote:

> The filtering is done at server side.
> See java doc for setFilter()
>
> On Sun, Mar 20, 2011 at 7:11 AM, Sindy <si...@gmail.com> wrote:
>
>> Hi,
>> I have a question about Scan.
>>
>>  *Scan s = new Scan();
>>  s.setFilter(f);
>>  ResultScanner scanner = _table.getScanner(s); *
>>
>> I want to know the operation about filter was done at server-side  or
>> client-side?
>>
>> the data was sent back to client-side before filtering or the data was
>> filtered then sent to client ?
>>
>>
>> Thanks
>> --
>> Sindy

Re: Scan with filter

Posted by Ted Yu <yu...@gmail.com>.

The filtering is done at server side.
See java doc for setFilter()

On Sun, Mar 20, 2011 at 7:11 AM, Sindy <si...@gmail.com> wrote:

> Hi,
> I have a question about Scan.
>
>  *Scan s = new Scan();
>  s.setFilter(f);
>  ResultScanner scanner = _table.getScanner(s); *
>
> I want to know the operation about filter was done at server-side  or
> client-side?
>
> the data was sent back to client-side before filtering or the data was
> filtered then sent to client ?
>
>
> Thanks
> --
> Sindy
>