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From "Matt McCline (JIRA)" <j...@apache.org>
Subject [jira] [Created] (ORC-380) Add isOnlyImplicitConversion boolean function to SchemaEvolution
Date Wed, 20 Jun 2018 21:33:00 GMT
Matt McCline created ORC-380:
--------------------------------

             Summary: Add isOnlyImplicitConversion boolean function to SchemaEvolution
                 Key: ORC-380
                 URL: https://issues.apache.org/jira/browse/ORC-380
             Project: ORC
          Issue Type: Bug
          Components: ORCv2
            Reporter: Matt McCline
            Assignee: Matt McCline


The current hasConversion boolean function returns true if there is *any* conversion between
the reader and file schemas.  Prasanth pointed out this is too strict for the check I'm adding
in HIVE-19951: "Vectorization: Need to disable encoded LLAP I/O for ORC when there is data
type conversion  (Schema Evolution)".  He points out that integer type widening and float
to double ought to be allowed.



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