[jira] [Created] (PARQUET-138) Parquet should allow a merge between required and optional schemas

["Robert Justice (JIRA)" <ji...@apache.org>]

Robert Justice created PARQUET-138:
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             Summary: Parquet should allow a merge between required and optional schemas
                 Key: PARQUET-138
                 URL: https://issues.apache.org/jira/browse/PARQUET-138
             Project: Parquet
          Issue Type: Bug
          Components: parquet-mr
    Affects Versions: parquet-mr_1.6.0
            Reporter: Robert Justice


In discussion with Ryan, he felt we should be able to merge from required binary to optional binary and the resulting schema would be optional

https://github.com/Parquet/parquet-mr/blob/master/parquet-column/src/test/java/parquet/schema/TestMessageType.java

try {
      t3.union(t4);
      fail("moving from optional to required");
    } catch (IncompatibleSchemaModificationException e) {
      assertEquals("repetition constraint is more restrictive: can not merge type required binary a into optional binary a", e.getMessage());
    }





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