yunchipang opened a new pull request, #7359:
URL: https://github.com/apache/datafusion-comet/pull/7359
## Which issue does this PR close?
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Closes #7033.
## Rationale for this change
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The native Iceberg scan failed with `Incorrect number of arrays for
StructArray fields, expected 2 got 1` when a data file omitted an optional
nested field without a schema change. The iceberg-rust bump in #7028 fixed
this, since iceberg-rust now matches nested fields by field id and fills in
missing ones with NULLs. Nothing tested this case.
## What changes are included in this PR?
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A test in `CometIcebergNativeSuite` that writes a data file without `s.b`
and `l.element.y`, using `write.spark.accept-any-schema`. It then checks that
the native scan matches Spark, with nested schema pruning on and off.
## How are these changes tested?
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The new test passes on main. On the parent of #7028, it fails with the error
from the issue.
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