Csaba Ringhofer created RANGER-3525:
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Summary: Clarify handling of column masks on nested types
Key: RANGER-3525
URL: https://issues.apache.org/jira/browse/RANGER-3525
Project: Ranger
Issue Type: Task
Components: Ranger
Reporter: Csaba Ringhofer
Apache Hive and Impala supports nested types (aka complex types), for example
array<int>, map<int,string> or struct<a:int, b:int>. The inner types of these
are accessed with column names containing "." characters, e.g
outer_struct.inner_struct.scalar_member.
It is not clear what should we do when a column mask is found on a nested type,
e.g. struct_col.member or array_col.item. Ranges allows adding policies on
column names with "." in them, but both and Apache Hive and Apache Impala
ignores these policies - I do not know about other engines.
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