GitHub user akashrn5 opened a pull request:

    https://github.com/apache/carbondata/pull/1980

    [CARBONDATA-2103]optimize show tables for filtering datamaps

    **Problem**
    Show tables was taking more time as two times lookup was happening to 
filter out the datamaps
    
    **Solution**
    add a hive table property which is true for all tables and false for 
datamaps like preAggregate table and show tables filter out these tables based 
on the property.
    
    Be sure to do all of the following checklist to help us incorporate 
    your contribution quickly and easily:
    
     - [ ] Any interfaces changed?
     
     - [ ] Any backward compatibility impacted?
     
     - [ ] Document update required?
    
     - [ ] Testing done
    UT is added
            Please provide details on 
            - Whether new unit test cases have been added or why no new tests 
are required?
            - How it is tested? Please attach test report.
            - Is it a performance related change? Please attach the performance 
test report.
            - Any additional information to help reviewers in testing this 
change.
           
     - [ ] For large changes, please consider breaking it into sub-tasks under 
an umbrella JIRA. 
    


You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/akashrn5/incubator-carbondata showTables

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/carbondata/pull/1980.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #1980
    
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commit 0e03851306ea9ba631be8e0e7c371337e7951dc9
Author: akashrn5 <akashnilugal@...>
Date:   2018-02-15T13:30:26Z

    optimize show tables for filtering datamaps

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