Mark Wagner created ORC-54:
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Summary: Evolve schemas based on field name rather than index
Key: ORC-54
URL: https://issues.apache.org/jira/browse/ORC-54
Project: Orc
Issue Type: Improvement
Reporter: Mark Wagner
Schema evolution as it stands today allows adding fields to the end of schemas
or removing them from the end. However, because it is based on the index of the
column, you can only ever add or remove -- not both.
ORC files have the full schema information of their contents, so there's
actually enough metadata to support changing columns anywhere in the schema.
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