comphead opened a new issue, #1633:
URL: https://github.com/apache/datafusion-comet/issues/1633
The test `native reader - read STRUCT of MAP fields` fails
with schema issue below
```
org.apache.spark.SparkException: Job aborted due to stage failure: Task
1 in stage 171.0 failed 1 times, most recent failure:
Lost task 1.0 in stage 171.0 (TID 179) (knode0099.cngya03.pie.silu.net
executor driver): org.apache.comet.CometNativeException: called
`Result::unwrap()`
on an `Err` value: InvalidArgumentError("Incorrect datatype for
StructArray field \"m0\", expected Map(Field { name: \"entries\",
data_type: Struct([Field { name: \"key\", data_type: Utf8, nullable:
false, dict_id: 0, dict_is_ordered: false, metadata: {} },
Field { name: \"value\", data_type: Int32, nullable: false, dict_id: 0,
dict_is_ordered: false, metadata: {} }]),
nullable: false, dict_id: 0, dict_is_ordered: false, metadata: {} },
false) got Map(Field { name: \"entries\", d
ata_type: Struct([Field { name: \"key\", data_type: Utf8, nullable:
false, dict_id: 0, dict_is_ordered: false, metadata: {} },
Field { name: \"value\", data_type: Int32, nullable: true, dict_id: 0,
dict_is_ordered: false, metadata: {} }]), nullable: false, dict_id: 0,
dict_is_ordered: false, metadata: {} }, false)")
```
Surprisingly that test `native reader - read STRUCT of MAP of STRUCT value
fields` passes 🤔
_Originally posted by @comphead in
https://github.com/apache/datafusion-comet/pull/1632#discussion_r2036308245_
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