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From The Watcher <watche...@gmail.com>
Subject Spark & Hive
Date Sun, 15 Feb 2015 11:03:41 GMT
I'm a little confused around Hive & Spark, can someone shed some light ?

Using Spark, I can access the Hive metastore and run Hive queries. Since I
am able to do this in stand-alone mode, it can't be using map-reduce to run
the Hive queries and I suppose it's building a query plan and executing it
all in Spark.

So, is this the same as
https://cwiki.apache.org/confluence/display/Hive/Hive+on+Spark%3A+Getting+Started
?
If not, why not and aren't they likely to merge at some point ?

If Spark really builds its own query plan, joins, etc without Hive's then
is everything that requires special SQL syntax in Hive supported : window
functions, cubes, rollups, skewed tables, etc

Thanks

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