[jira] [Resolved] (IMPALA-13982) Calcite Planner: Support views for the Calcite planner in Impala

["Fang-Yu Rao (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IMPALA-13982?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Fang-Yu Rao resolved IMPALA-13982.
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    Resolution: Fixed

> Calcite Planner: Support views for the Calcite planner in Impala
> ----------------------------------------------------------------
>
>                 Key: IMPALA-13982
>                 URL: https://issues.apache.org/jira/browse/IMPALA-13982
>             Project: IMPALA
>          Issue Type: Sub-task
>            Reporter: Fang-Yu Rao
>            Assignee: Fang-Yu Rao
>            Priority: Major
>
> We should be able to support views for the Calcite planner in Impala without a lot of code changes to the current implementation.
> The ideas is to add a {{TableVisitor}} to traverse the AST right before we analyze the AST using Calcite's own {{SqlValidator}} in [https://github.com/apache/impala/blob/master/java/calcite-planner/src/main/java/org/apache/impala/calcite/service/CalciteAnalysisDriver.java] and replace nodes representing views with the underlying definitions of views.
> We also have to take authorization into consideration. Recall that for a view created by a non-superuser, Impala further requires the requesting user to have the privileges on the underlying tables referenced by the view. Refer to [IMPALA-10122 (Part 2): Allow accessing views created by non-superusers|https://github.com/apache/impala/commit/607dc1f170fb8cc013d8ec33fccee59ac4352fe4] for more details. This implies that given an AST after the node replacement mentioned above, we need to distinguish a {{SqlSelect}} node derived from a view from a {{SqlSelect}} that was not derived from a view.



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