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java.lang.Objectcom.ebay.erl.mobius.core.GroupByConfigure
public class GroupByConfigure
Specify the "group-by" columns in a grouping job.
This class cannot be initialized directly
by users. Use MobiusJob.group(Dataset)
to get an instance of this class and start a
group-by job.
This product is licensed under the Apache License, Version 2.0,
available at http://www.apache.org/licenses/LICENSE-2.0.
This product contains portions derived from Apache hadoop which is
licensed under the Apache License, Version 2.0, available at
http://hadoop.apache.org.
© 2007 – 2012 eBay Inc., Evan Chiu, Woody Zhou, Neel Sundaresan
Method Summary | |
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Persistable |
by(java.lang.String... columns)
Specify the columns to be grouped by. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Method Detail |
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public Persistable by(java.lang.String... columns) throws java.io.IOException
columns
must all in the
participated Dataset
, the
one specified in MobiusJob.group(Dataset)
.
java.io.IOException
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