[SPARK-16360][SQL] Speed up SQL query performance by removing redundant `executePlan` call#14044

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Commits on Jul 4, 2016

[SPARK-16360][SQL] Speed up SQL query performance by removing redundant analysis in `Dataset`
dongjoon-hyun
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Commits on Jul 5, 2016

Revert the change about queryExecution.assertAnalyzed.
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