suyiteng created ORC-1813:
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Summary: Incompatibility with ORC files written in version 0.12
due to missing hasNull field in C++ Reader
Key: ORC-1813
URL: https://issues.apache.org/jira/browse/ORC-1813
Project: ORC
Issue Type: Bug
Components: C++
Affects Versions: 2.0.3
Reporter: suyiteng
Assignee: suyiteng
We encountered an issue with the C++ implementation of the ORC reader when
handling ORC files written with version 0.12. Specifically, files written in
this version do not include the hasNull field in the column statistics
metadata. While the Java implementation of the ORC reader handles this
gracefully by defaulting hasNull to true when the field is absent, the C++
implementation does not handle this scenario correctly.
*This issue prevents predicates like IS NULL from being pushed down to the ORC
reader!!! As a result, all rows in the file are filtered out, leading to
incorrect query results :(*
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