Github user JamesRTaylor commented on the pull request:

    https://github.com/apache/phoenix/pull/135#issuecomment-160852616
  
    Couple of other comments:
    - You'll need to add code during installation of 4.7.0 (in 
ConnectionQueryServicesImpl.init()) that takes care of removing old 
coprocessors, adding new coprocessors, disabling local indexes and potentially 
automatically kicking off a new index build
    - We'll likely want to add a check that disallows column family names 
prefixed with "C#" to prevent inadvertently treating these as local index 
shadow column families. If we can get rid of the checks that use this prefix, 
then we might not need to do this.
    - Also, there's an edge case of an existing column family using the "C#" 
prefix. Unlikely, but not sure how we'd want to handle this. Maybe error on an 
attempt to create a local index on such a table?


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