|
||||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Objectcom.ebay.erl.mobius.core.JoinOnConfigure
public class JoinOnConfigure
Specify the join relationship in a Mobius join job.
A join relationship defines the columns to be used as the join keys of the participating datasets.
Use MobiusJob.innerJoin(Dataset...)
,
MobiusJob.leftOuterJoin(Dataset, Dataset, Object)
or
MobiusJob.rightOuterJoin(Dataset, Dataset, Object)
to
obtain an instance of this class to create a join 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
Nested Class Summary | |
---|---|
static class |
JoinOnConfigure.EQ
Specify the equal relationship of columns from different datasets. |
Method Summary | |
---|---|
Persistable |
on(JoinOnConfigure.EQ... eqs)
Specify the joining columns from the dataset. |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Method Detail |
---|
public Persistable on(JoinOnConfigure.EQ... eqs) throws java.io.IOException
Where there are more than one JoinOnConfigure.EQ
in the
argument, they will be concatenated together
with AND.
Mobius only supports equal-join, ex: dataset1.column1=dataset2.column1.
java.io.IOException
|
||||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |