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Posted to dev@orc.apache.org by "Matt McCline (JIRA)" <ji...@apache.org> on 2018/06/20 21:33:00 UTC

[jira] [Created] (ORC-380) Add isOnlyImplicitConversion boolean function to SchemaEvolution

Matt McCline created ORC-380:
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             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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