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From hadoop n00b <>
Subject Mapjoin Usage Question
Date Thu, 20 Jan 2011 07:00:50 GMT

How do I use the mapjoin hint in a query.

Say, I have two tables t1 and t2 where t2 is the smaller table. Do I specify
t2 in the mapjoin hint?

select /*+ mapjoin(b)*/ * from t1 join t2 b on ( =

If I am joining two smaller tables, can I specify two clauses in the
mapjoin? /*+mapjoin(b,c)*/?

I am unable to find much documentation on this. I am using CDH2 with Hive


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