tharvey5 opened a new issue, #13170:
URL: https://github.com/apache/iceberg/issues/13170
### Feature Request / Improvement
Using Iceberg 1.5.2 and Flink 1.18, this occurs using both legacy source API
and new source API (Flip27 enabled)
We have run into the following exception when running a Flink Batch Query
```
Caused by: java.lang.ClassCastException: Cannot cast
org.apache.flink.table.data.GenericArrayData to java.util.List
at java.lang.Class.cast(Class.java:3397)
at org.apache.iceberg.flink.RowDataWrapper.get(RowDataWrapper.java:74)
at org.apache.iceberg.Accessors$PositionAccessor.get(Accessors.java:71)
at org.apache.iceberg.Accessors$PositionAccessor.get(Accessors.java:58)
at
org.apache.iceberg.expressions.BoundReference.eval(BoundReference.java:40)
at
org.apache.iceberg.expressions.Evaluator$EvalVisitor.notNull(Evaluator.java:91)
at
org.apache.iceberg.expressions.Evaluator$EvalVisitor.notNull(Evaluator.java:51)
at
org.apache.iceberg.expressions.ExpressionVisitors$BoundVisitor.predicate(ExpressionVisitors.java:300)
at
org.apache.iceberg.expressions.ExpressionVisitors.visitEvaluator(ExpressionVisitors.java:390)
at
org.apache.iceberg.expressions.ExpressionVisitors.visitEvaluator(ExpressionVisitors.java:409)
at
org.apache.iceberg.expressions.Evaluator$EvalVisitor.eval(Evaluator.java:56)
at
org.apache.iceberg.expressions.Evaluator$EvalVisitor.access$100(Evaluator.java:51)
at org.apache.iceberg.expressions.Evaluator.eval(Evaluator.java:48)
at
org.apache.iceberg.flink.FlinkSourceFilter.filter(FlinkSourceFilter.java:47)
at
org.apache.iceberg.io.CloseableIterable$4.shouldKeep(CloseableIterable.java:112)
at org.apache.iceberg.io.FilterIterator.advance(FilterIterator.java:66)
at org.apache.iceberg.io.FilterIterator.hasNext(FilterIterator.java:49)
at org.apache.iceberg.io.FilterIterator.advance(FilterIterator.java:64)
at org.apache.iceberg.io.FilterIterator.hasNext(FilterIterator.java:49)
at
org.apache.iceberg.flink.source.DataIterator.updateCurrentIterator(DataIterator.java:127)
at
org.apache.iceberg.flink.source.DataIterator.seek(DataIterator.java:90)
at
org.apache.iceberg.flink.source.reader.DataIteratorReaderFunction.apply(DataIteratorReaderFunction.java:40)
at
org.apache.iceberg.flink.source.reader.DataIteratorReaderFunction.apply(DataIteratorReaderFunction.java:27)
at
org.apache.iceberg.flink.source.reader.IcebergSourceSplitReader.fetch(IcebergSourceSplitReader.java:84)
at
org.apache.flink.connector.base.source.reader.fetcher.FetchTask.run(FetchTask.java:58)
at
org.apache.flink.connector.base.source.reader.fetcher.SplitFetcher.runOnce(SplitFetcher.java:165)
... 6 more
```
To work around the issue we have temporarily added a condition in
RowDataWrapper#get as a **short term solution**
```
if (value instanceof org.apache.flink.table.data.GenericArrayData
&& javaClass == java.util.List.class) {
org.apache.flink.table.data.GenericArrayData arrayData =
(org.apache.flink.table.data.GenericArrayData) value;
return
javaClass.cast(java.util.Arrays.asList(arrayData.toObjectArray()));
}
```
We are wondering if there is any plan to address this issue since this
doesn't address other cases such as GenericArrayData or nested Generic*Data
### Query engine
Flink
### Willingness to contribute
- [x] I can contribute this improvement/feature independently
- [x] I would be willing to contribute this improvement/feature with
guidance from the Iceberg community
- [ ] I cannot contribute this improvement/feature at this time
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