[jira] [Created] (HIVE-13178) Enhance ORC Schema Evolution to handle more standard data type conversions

["Matt McCline (JIRA)" <ji...@apache.org>]

Matt McCline created HIVE-13178:
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             Summary: Enhance ORC Schema Evolution to handle more standard data type conversions
                 Key: HIVE-13178
                 URL: https://issues.apache.org/jira/browse/HIVE-13178
             Project: Hive
          Issue Type: Bug
          Components: Hive, ORC
            Reporter: Matt McCline
            Assignee: Matt McCline
            Priority: Critical


Currently, SHORT -> INT -> BIGINT is supported.

Handle ORC data type conversions permitted by Implicit conversion allowed by TypeIntoUtils.implicitConvertible method.

   *   STRING_GROUP -> DOUBLE
   *   STRING_GROUP -> DECIMAL
   *   DATE_GROUP -> STRING
   *   NUMERIC_GROUP -> STRING
   *   STRING_GROUP -> STRING_GROUP
   *
   *   // Upward from "lower" type to "higher" numeric type:
   *   BYTE -> SHORT -> INT -> BIGINT -> FLOAT -> DOUBLE -> DECIMAL



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