lgbo-ustc opened a new issue, #12172: URL: https://github.com/apache/gluten/issues/12172
### Backend CH (ClickHouse) ### Bug description `cpp-ch/local-engine/AggregateFunctions/GroupLimitFunctions.cpp:138-145` reads `ColumnArray` offsets from an empty result column. `insertResultInto` calls `result_array_offsets.back()` before pushing the first offset. A newly created aggregate result column has no offsets yet, so the first output row can access an empty container. The previous offset should be treated as `0` when `result_array_offsets.empty()`. ### Gluten version _No response_ ### Spark version None ### Spark configurations _No response_ ### System information _No response_ ### Relevant logs ```bash ``` -- 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]
