Thursday, April 10, 2014

Hive Query Plan Generation

Hive query is passed through several built-in modules for the final plan to be generated.

The stages/ modules are:

Query 
     => (1) Parser 
               => (2) Semantic Analyzer 
                     => (3) Logical Plan Generation  
                           => (4) Optimizer 
                                => (5) Physical Plan Generation
                                         => Executor to run on Hadoop

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