imply-cheddar opened a new pull request, #13739: URL: https://github.com/apache/druid/pull/13739
This virtual columns enables falling back to another column if the original column doesn't exist. This is useful when doing column migrations and you have some old data with column X, new data with column Y and you want to use Y if it exists, X otherwise so that you can run a consistent query against all of the data. This PR has: - [x] been self-reviewed. - [x] added Javadocs for most classes and all non-trivial methods. Linked related entities via Javadoc links. - [x] added unit tests or modified existing tests to cover new code paths, ensuring the threshold for [code coverage](https://github.com/apache/druid/blob/master/dev/code-review/code-coverage.md) is met. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
