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From Namit Jain <>
Subject Re: Vs.
Date Wed, 28 Nov 2012 04:06:57 GMT

Optimizations in the Transform take the operator tree and transform that
into a new operator tree.
Then the operator tree is broken into various tasks.
Physical optimizer takes a task and optimizes/changes the task.

Both these optimizations are done at compile time.

There is nothing like a runtime optimization right now, the plan does not
change dynamically.

On 11/28/12 8:54 AM, "Mahsa Mofidpoor" <> wrote:

>1) Does Hive consider a clear-cut distinction between compile-time
>optimization and run-time optimization?
>2) Does anybody know the difference between the optimizations implementing
>the Transform and the ones implementing the PhysicalPlanResolver? Why such
>optimizations are they in separate packages?
>Thanks and Regards,

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