branch-4.0: [fix](fe) Fix Ranger column-level privilege bypass when CTE combined #61741#63047
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…61741) ### What problem does this PR solve? Issue Number: close #61631 Problem Summary: When a CTE (WITH ... AS) is referenced multiple times in a JOIN query and is not inlined (due to inlineCTEReferencedThreshold), the CheckPrivileges rule does not traverse the CTE producer subtree because LogicalCTEConsumer is a leaf node in the plan tree. This means column-level privileges on the CTE's underlying tables are never checked, allowing users without proper column access to bypass Ranger authorization. The fix adds a `visitLogicalCTEConsumer` override in `CheckPrivileges` that explicitly retrieves the CTE producer plan (stored by `RewriteCteChildren`) and traverses it for privilege checking. The `privChecked` flag remains on `StatementContext` to preserve the view permission passthrough mechanism. ### Release note Fixed a security issue where Ranger column-level privileges could be bypassed when using CTE (WITH ... AS) combined with JOIN queries. Users without proper column access permissions could read restricted columns through CTE+JOIN patterns. ### Check List (For Author) - Test: Unit Test / Manual test (verified with Ranger 2.7.0 + Doris 4.0.2 environment) - Behavior changed: No - Does this need documentation: No --------- Co-authored-by: geshengli <geshengli@wps.cn>
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Cherry-picked from #61741