branch-4.1: [fix](fe) Reject TopN in correlated scalar subquery #64251#64351
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### What problem does this PR solve? Related PR: #39471 Problem Summary: Correlated scalar subqueries with `ORDER BY ... LIMIT 1` were treated like plain `LIMIT 1` subqueries. Analysis eliminated the root `LogicalLimit`, which also discarded the TopN semantics instead of rejecting this unsupported correlated-subquery shape. This change only eliminates a correlated scalar subquery's `LIMIT 1` when the limit does not wrap a `LogicalSort`. A TopN remains in the analyzed plan and is rejected by the existing correlated-subquery validation. FE unit and regression tests verify that `ORDER BY ... LIMIT 1` is rejected, while the existing plain `LIMIT 1` coverage continues to verify the supported path. ### Release note Reject correlated scalar subqueries containing `ORDER BY` with `LIMIT 1`.
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run buildall |
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FE UT Coverage ReportIncrement line coverage |
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FE Regression Coverage ReportIncrement line coverage |
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Cherry-picked from #64251