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Cc: user <user@hbase.apache.org>
From: Ted Yu <yuzhihong@gmail.com>
Subject: Re: How to quickly count the rows that meet several conditions using
 hbase coprocessor
Date: Fri, 17 Jan 2014 02:03:26 -0800
To: "user@hbase.apache.org" <user@hbase.apache.org>

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Take a look at http://hbase.apache.org/0.94/apidocs/org/apache/hadoop/hbase/=
client/coprocessor/AggregationClient.html#rowCount(byte[],%20org.apache.hado=
op.hbase.coprocessor.ColumnInterpreter,%20org.apache.hadoop.hbase.client.Sca=
n)

You can pass custom filter through Scan parameter.=20

Cheers

On Jan 16, 2014, at 11:58 PM, "leiwangouc@gmail.com" <leiwangouc@gmail.com> w=
rote:

> Hi,
>=20
> I know that hbase copocessor provides a quick way to count the rows of a t=
able.
> But how can i count the rows that meet several conditions.
>=20
> Take this for example.=20
> I have a hbase table with one column family, several columns. I want to ca=
culate the number of rows that meet 3 conditions:
> has column1
> has column2
> has column3  and the value of column3 satisfy a regular expression
>=20
> Thans,
> Lei
>=20
>=20
>=20
> leiwangouc@gmail.com

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