[jira] [Work started] (IMPALA-7842) Refactor FrontEnd to make plan fragments available for testing

["Paul Rogers (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IMPALA-7842?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on IMPALA-7842 started by Paul Rogers.
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> Refactor FrontEnd to make plan fragments available for testing
> --------------------------------------------------------------
>
>                 Key: IMPALA-7842
>                 URL: https://issues.apache.org/jira/browse/IMPALA-7842
>             Project: IMPALA
>          Issue Type: Improvement
>          Components: Frontend
>    Affects Versions: Impala 3.0
>            Reporter: Paul Rogers
>            Assignee: Paul Rogers
>            Priority: Minor
>
> Today, the {{FrontEnd}} class uses a functional model to generate a plan: pass in SQL text to the {{createExecRequest()}} method and get back a Thrift plan ready for serialization.
> For unit testing, however, we need access to the intermediate plan fragments produced by the planner. Inspecting only the Thrift version results in loss of important details.
> This ticket asks to create a new {{PlanCtx}} which can capture the details for testing.



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