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From: Doug Meil <doug.meil@explorysmedical.com>
To: "user@hbase.apache.org" <user@hbase.apache.org>
Subject: Re: Scan.addFamiliy reduces results
Thread-Topic: Scan.addFamiliy reduces results
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Date: Thu, 15 Mar 2012 16:39:34 +0000
Message-ID: <CB87934D.27213%doug.meil@explorysmedical.com>
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re:  "However, I am getting different number of results, depending on
which families are added"

Yes.

I'd suggest you read this in the RefGuide.

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


On 3/15/12 12:08 PM, "Peter Wolf" <opus111@gmail.com> wrote:

>Hi all,
>
>I am doing a scan on a table with multiple families.  My code looks like
>this...
>
>         Scan scan =3D new Scan(calculateStartRowKey(a),
>calculateEndRowKey(b));
>
>         scan.setCaching(10000);
>         Filter filter =3D new SingleColumnValueFilter(xFamily, xColumn,
>CompareFilter.CompareOp.EQUAL, Bytes.toBytes(x));
>         scan.setFilter(filter);
>         scan
>                 .addFamily(xFamily)
>                 .addFamily(yFamily)
>                 .addFamily(zFamily);
>
>         ResultScanner scanner =3D hTable.getScanner(scan);
>
>         Iterator<Result> it =3D scanner.iterator();
>         int resultCount =3D 0;
>         while (it.hasNext()) {
>               Result result =3D it.next();
>
>               resultCount++;
>         }
>
>However, I am getting different number of results, depending on which
>families are added.  For example these give different result counts
>
>         scan
>                 //.addFamily(xFamily)
>                 .addFamily(yFamily)
>                 .addFamily(zFamily);
>and
>         scan
>                 .addFamily(xFamily)
>                 .addFamily(yFamily)
>                 .addFamily(zFamily);
>
>
>There is no error message, and I don't see anything in the Scan
>documentation.  Does anyone know what is going on?
>
>Thanks
>Peter
>
>
>