feat(reader): null struct default values in create_column #1847
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…etes.testPosDeletesOnParquetFileWithMultipleRowGroups in Iceberg Java 1.10 with DataFusion Comet.
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mbutrovich
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16 tasks
liurenjie1024
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Nov 13, 2025
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liurenjie1024
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Thanks @mbutrovich for this fix!
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Fixes
TestSparkReaderDeletes.testPosDeletesOnParquetFileWithMultipleRowGroupsin Iceberg Java 1.10 with DataFusion Comet.Which issue does this PR close?
What changes are included in this PR?
RecordBatchTransformerdoes not have exhaustive nested type support yet, this adds logic tocreate_columnin the specific scenario for a schema evolution with a new struct column that uses the default NULL value.Are these changes tested?
New test to reflect what happens with Iceberg Java 1.10's
TestSparkReaderDeletes.testPosDeletesOnParquetFileWithMultipleRowGroups. The test is misleading, since I figured testing positional deletes would just be a delete vector and be schema agnostic, but it includes schema change with binary and struct types so we need default NULL values.