jinchengchenghh opened a new issue, #8948:
URL: https://github.com/apache/incubator-gluten/issues/8948
### Backend
VL (Velox)
### Bug description
Reproduce,
IcebergSuite, remove the GLUTEN_ENABLED false in delete sql block
GlutenTestMergeOnReadDelete#testAggregatePushDownInMergeOnReadDelete,
If fallback by config `spark.gluten.sql.columnar.batchscan=false`, the tests
can pass.
Maybe the IcebergScanTransformer has some hidden bugs.
```
Caused by: java.lang.NullPointerException
at
org.apache.spark.sql.catalyst.expressions.GeneratedClass$SpecificUnsafeProjection.apply(Unknown
Source)
at
org.apache.spark.sql.execution.exchange.ShuffleExchangeExec$.$anonfun$prepareShuffleDependency$6(ShuffleExchangeExec.scala:317)
at
org.apache.spark.sql.execution.exchange.ShuffleExchangeExec$.$anonfun$prepareShuffleDependency$6$adapted(ShuffleExchangeExec.scala:317)
at
org.apache.spark.sql.execution.exchange.ShuffleExchangeExec$.$anonfun$prepareShuffleDependency$14(ShuffleExchangeExec.scala:386)
at scala.collection.Iterator$$anon$10.next(Iterator.scala:461)
at
org.apache.spark.shuffle.sort.BypassMergeSortShuffleWriter.write(BypassMergeSortShuffleWriter.java:169)
at
org.apache.spark.shuffle.ShuffleWriteProcessor.write(ShuffleWriteProcessor.scala:59)
at
org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:101)
at
org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:53)
at
org.apache.spark.TaskContext.runTaskWithListeners(TaskContext.scala:161)
```
### Spark version
Spark-3.4.x
### Spark configurations
_No response_
### System information
_No response_
### Relevant logs
```bash
```
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