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From Jean-Daniel Cryans <jdcry...@apache.org>
Subject Re: question on filters
Date Fri, 25 May 2012 18:27:47 GMT
What you need is a secondary index and HBase doesn't have that. For
some tips see: http://hbase.apache.org/book.html#secondary.indexes

J-D

On Thu, May 24, 2012 at 5:06 PM, jack chrispoo <jackchrispoo@gmail.com> wrote:
> Hi,
>
> I'm new to HBase and I have a question about using filters. I know that I
> can use filters with scan, say scan start-key=key1 & end-key=key2 and with
> a SingleColumnValueFilter: columnA=valueA. But in my java program I need to
> do filtering on a set of rows which are not contiguous, my client needs to
> get all rows with rowid in a set<String> and with columnA=valueA. I don't
> know how this can be done efficiently. I can imagine that I can do a scan
> of the entire table and set filers rowid=... and columnA=valueA; or I can
> use get function to get the rows with rowid in my set all to my client and
> do the filtering on my client side. But I think neither way is efficient.
> Can anyone give me a hint on this?
>
> Thanks
> Yixiao

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