[jira] [Created] (ORC-789) Supporting schema evolution for union expansion

["Lei Sun (Jira)" <ji...@apache.org>]

Lei Sun created ORC-789:
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             Summary: Supporting schema evolution for union expansion
                 Key: ORC-789
                 URL: https://issues.apache.org/jira/browse/ORC-789
             Project: ORC
          Issue Type: Improvement
            Reporter: Lei Sun
            Assignee: Lei Sun


We are seeing the following schema evolution occurred from time to time while ORC library doesn't seem to support that: 
{code:java}
Error: org.apache.orc.impl.SchemaEvolution$IllegalEvolutionException: ORC does not support type conversion from file type uniontype<(obfuscated List of columns),struct<correctPin:string,userInput:string>> to reader type uniontype<(obfuscated List of columns),struct<correctPin:string,userInput:string>,struct<version:string>>
{code}
We would like to add the support. 

 



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