Fix empty struct type in selectNot call #59
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…pty-struct' into rzhang-fix-buildOrcProjection-empty-struct # Conflicts: # api/src/test/java/org/apache/iceberg/types/TestTypeUtil.java
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@rzhang10 Can you file this upstream? Since this touches the API module, it will be helpful to not diverge from upstream. |
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Issue: we encounter dali2 spark exception reading a specific table, upon analysis, this table has a empty struct inside its schema, and this cause iceberg internally to not be able to construct the correct number of readers to match the fiedls, and thus throws a NPE. Upon debugging and analysis, the code that doesn't handle the empty struct correctly is in GetProjectedIds.java via TypeUtil.getIdsInternal call.
Tested the table with the empty struct schema using spark-shell, the table could now be read without exception.