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https://issues.apache.org/jira/browse/HIVE-924?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12789972#action_12789972
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Namit Jain commented on HIVE-924:
---------------------------------

OK, let us do it in 2 patches - but do them quickly. 

> Extract LogicalPlan and PhysicalPlan classes from SemanticAnalysis class
> ------------------------------------------------------------------------
>
>                 Key: HIVE-924
>                 URL: https://issues.apache.org/jira/browse/HIVE-924
>             Project: Hadoop Hive
>          Issue Type: Bug
>          Components: Query Processor
>            Reporter: Carl Steinbach
>         Attachments: HIVE-924.patch
>
>
> Currently the SemanticAnalyzer class handles semantic analysis, as well as 
> logical plan generation and physical plan generation. I think it would be 
> beneficial to extract distinct LogicalPlan and PhysicalPlan classes from the 
> SemanticAnalyzer, and have the query processing phase be coordinated by a 
> QueryCompiler class that would be responsible for triggering the parsing, 
> semantic analysis, logical plan generation, optimization, and physical plan 
> generation phases. This proposed reorganization of components would help to 
> isolate the state of each phase, and would also bring the source into closer 
> alignment with the description of the query compiler in the Hive design 
> document on the wiki.

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