chenhao-db opened a new pull request, #46486: URL: https://github.com/apache/spark/pull/46486
### What changes were proposed in this pull request? It adds null checks when accessing a nested element when casting a nested type to variant. It is necessary because the `get` API doesn't guarantee to return null when the slot is null. For example, `ColumnarArray.get` may return the default value of a primitive type if the slot is null. ### Why are the changes needed? It is a bug fix is necessary for the cast-to-variant expression to work correctly. ### Does this PR introduce _any_ user-facing change? No. ### How was this patch tested? Two new unit tests. One directly uses `ColumnarArray` as the input of the cast. The other creates a real-world situation where `ColumnarArray` is the input of the cast (scan). Both of them would fail without the code change in this PR. ### Was this patch authored or co-authored using generative AI tooling? No. -- 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: reviews-unsubscr...@spark.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org
