ShauryaChauhan1411 opened a new pull request, #17221: URL: https://github.com/apache/iotdb/pull/17221
## Description This PR fixes a ClassCastException occurring in the UDF transformation layer when processing large datasets with the M4 aggregation function. The issue was caused by a LongColumn being incorrectly treated as a TimeColumn within ElasticSerializableTVList. ## Design Decisions Helper Method: Added a private helper method ensureTimeColumn(Column column) in ElasticSerializableTVList to verify if the input column is an instance of TimeColumn. Safe Conversion: If the input is not a TimeColumn (e.g., a LongColumn), the helper extracts the values into a long[] array and constructs a new TimeColumn object, ensuring type safety. Comprehensive Coverage: Applied this check to all code paths in putColumn(...) where insertedTimeColumn is assigned, including cases where data is split via getRegionCopy. ## Verification Build: Successfully completed mvn clean compile and mvn spotless:apply. [cite: 2026-02-26] Tests: All relevant integration tests passed (47/47). [cite: 2026-02-26] Manual Verification: Verified that the reproduction query provided in Issue #16539 no longer triggers a ClassCastException. -- 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]
