The execution process of HQL in Hive's architecture

Others 2022-04-28 09:47:38 views: 0

 
  One HQL statement how to query in hive
  

 
  Interpreter, compiler, optimizer complete HQL query statement from lexical analysis, syntax analysis, compilation, optimization and query plan generation. The resulting query plan is stored in HDFS and executed in subsequent MapReduce calls.
  

 
  How to view the execution plan of oracle
  

 
Execution plan without index creation
  

 
Execution plan for creating an index
  

 
  Hive's execution plan is similar to oracle's execution plan
  

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