Merge pull request #51105 from ClickHouse/backport/22.8/51064

Backport #51064 to 22.8: Fix subtly broken copy-on-write of ColumnLowCardinality dictionary
ClickHouse · Jun 16, 2023 · 0320f1c · 0320f1c
2 parents d484e5d + a154122
commit 0320f1c
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/Columns/ColumnLowCardinality.h b/src/Columns/ColumnLowCardinality.h
@@ -329,7 +329,7 @@ class ColumnLowCardinality final : public COWHelper<IColumn, ColumnLowCardinalit
         explicit Dictionary(MutableColumnPtr && column_unique, bool is_shared);
         explicit Dictionary(ColumnPtr column_unique, bool is_shared);
 
-        const ColumnPtr & getColumnUniquePtr() const { return column_unique; }
+        const WrappedPtr & getColumnUniquePtr() const { return column_unique; }
         WrappedPtr & getColumnUniquePtr() { return column_unique; }
 
         const IColumnUnique & getColumnUnique() const { return static_cast<const IColumnUnique &>(*column_unique); }