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https://issues.apache.org/jira/browse/IMPALA-9597?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Fang-Yu Rao updated IMPALA-9597:
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Summary: Eliminate redundant Ranger audits when a query involves column
masking (was: Deduplicate Ranger audits when a column is referenced multiple
times)
> Eliminate redundant Ranger audits when a query involves column masking
> ----------------------------------------------------------------------
>
> Key: IMPALA-9597
> URL: https://issues.apache.org/jira/browse/IMPALA-9597
> Project: IMPALA
> Issue Type: Improvement
> Components: Frontend
> Reporter: Fang-Yu Rao
> Assignee: Fang-Yu Rao
> Priority: Major
>
> After [IMPALA-9350|https://issues.apache.org/jira/browse/IMPALA-9350], Impala
> is able to produce the corresponding Ranger audits when a query involves
> policies of column masking. However, duplicate audit events will be produced
> if a column is referenced multiple times in a query.
> For instance, since the following query would result in 2 calls to
> {{SelectStmt#analyze()}} on the same table, given that there is a column
> masking policy for the column of {{string_col}}, we will see 2 duplicate
> audit events for this column.
> {noformat}
> with iv as (select id, bool_col, string_col from functional.alltypestiny)
> select * from iv;
> {noformat}
> We should thus deduplicate the audits in the case described above.
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