[ https://issues.apache.org/jira/browse/ORC-54?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15424755#comment-15424755 ]
ASF GitHub Bot commented on ORC-54: ----------------------------------- Github user asfgit closed the pull request at: https://github.com/apache/orc/pull/40 > 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 > Assignee: 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. -- This message was sent by Atlassian JIRA (v6.3.4#6332)