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https://issues.apache.org/jira/browse/IMPALA-15126?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zoltán Borók-Nagy resolved IMPALA-15126.
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Fix Version/s: Impala 5.0.0
Resolution: Fixed
> NullPointerException for STRUCT.* expansion on masked tables
> ------------------------------------------------------------
>
> Key: IMPALA-15126
> URL: https://issues.apache.org/jira/browse/IMPALA-15126
> Project: IMPALA
> Issue Type: Bug
> Components: Frontend
> Reporter: Zoltán Borók-Nagy
> Assignee: Zoltán Borók-Nagy
> Priority: Major
> Fix For: Impala 5.0.0
>
>
> When a Ranger column-masking policy is defined and a query expands a struct
> with a star path (STRUCT.*) such that the expansion includes complex
> sub-fields, analysis fails with a server-side NullPointerException.
> Steps to reproduce:
> 1. Add any column-masking policy on functional_parquet.complextypestbl for
> the requesting user (e.g. id → CUSTOM 100 * \{col}) so the table is served
> through a table-masking view.
> 2.
> {noformat}
> REFRESH AUTHORIZATION;{noformat}
> 3. As the masked user, run:
> {noformat}
> SET EXPAND_COMPLEX_TYPES=true;
> SELECT id, nested_struct.* FROM functional_parquet.complextypestbl;{noformat}
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