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TopK aggregation fails with string columns, especially Utf8View

TopK aggregation fails with string columns, especially Utf8View: a task in LegoFlow-SWE (Harbor dataset). The same query works correctly without LIMIT , and works when the TopK aggregation optimization is disabled.

The task

The same query works correctly without `LIMIT`, and works when the TopK aggregation optimization is disabled.

Part of Lego-X/LegoFlow-SWE.