maheshrajus opened a new pull request, #4264:
URL: https://github.com/apache/carbondata/pull/4264

    ### Why is this PR needed?
   Currently materialized view(mv) is enabled by default. In concurrent 
scenarios with default mv enabled each session is going through the list of 
databases even though mv not used. Due to this query time increased.
    
    ### What changes were proposed in this PR?
   Disable mv by default as users using mv rarely. If user required then enable 
and use it.
       
    ### Does this PR introduce any user interface change?
    - No
   
    ### Is any new testcase added?
    - Yes
   
       
   


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