FelixYBW opened a new issue, #6612:
URL: https://github.com/apache/incubator-gluten/issues/6612
### Backend
VL (Velox)
### Bug description
A query has parquet scan with complex data type fallbacked.
If I set spark.sql.parquet.enableVectorizedReader = False and run the query
twice, the first one is correct, but the second one wrongly add ColumnartoRow,
caused error `UnsafeRow cannot be cast to
org.apache.spark.sql.vectorized.ColumnarBatch`
First query plan:
```
+- ^ FilterExecTransformer (5)
+- ^ InputIteratorTransformer (4)
+- RowToVeloxColumnar (2)
+- Scan parquet (1)
```
The second query plan:
```
+- ^ InputIteratorTransformer (5)
+- RowToVeloxColumnar (3)
+- * ColumnarToRow (2)
+- Scan parquet (1)
```
Similarly if I set spark.sql.parquet.enableVectorizedReader = True, the
first run reports error and the second run successed.
### Spark version
Spark-3.2.x
### Spark configurations
_No response_
### System information
_No response_
### Relevant logs
_No response_
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