[jira] [Work started] (IMPALA-9330) Support masking queries containing correlated collection references

["Quanlong Huang (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IMPALA-9330?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on IMPALA-9330 started by Quanlong Huang.
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> Support masking queries containing correlated collection references
> -------------------------------------------------------------------
>
>                 Key: IMPALA-9330
>                 URL: https://issues.apache.org/jira/browse/IMPALA-9330
>             Project: IMPALA
>          Issue Type: Improvement
>            Reporter: Quanlong Huang
>            Assignee: Quanlong Huang
>            Priority: Critical
>
> Let's say table complextypestbl (id bigint, int_arr array<int>) has column masking policy on id: "id => id * 100". The following query is not rewritten correctly:
> {code:sql}
> select t.id, a.pos, a.item from complextypestbl t, t.int_arr a;
> {code}
> Because its AST will be rewritten to the AST of
> {code:sql}
> select t.id, a.pos, a.item from (
>   select cast(id * 100 as BIGINT) id
>   from complextypestbl
> ) t, t.int_arr a;
> {code}
> Currently, the analyzer can't resolve "t.int_arr" correctly.



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