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From yufeldman <...@git.apache.org>
Subject [GitHub] drill pull request: DRILL-4596: Drill should do version check amon...
Date Mon, 11 Apr 2016 20:45:34 GMT
Github user yufeldman commented on the pull request:

    Not sure how that comment contradicts with what I said. Adding new feature in the next
version should not break previous version. 
    > On Apr 11, 2016, at 12:41 PM, arina-ielchiieva <notifications@github.com> wrote:
    > I thought it's hard to maintain backward compatibility. Quoting Parth comment from
    > "Drill needs to be able to run queries that depend only on features that are in the
oldest version of Drill in the cluster. Say for example, most drillbits are at version N and
some are at version N+1. You added support for a new type foo in version N+1. Any queries
not using or depending on type foo should run successfully. Queries depending on foo can only
run successfully after all the drillbits are upgraded to N+1."
    > —
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