Merge pull request #58318 from ClickHouse/fix-fuzzer-sparse

Fixed logical error in CheckSortedTransform

src/Processors/Transforms/CheckSortedTransform.cpp

@@ -52,6 +52,11 @@ void CheckSortedTransform::transform(Chunk & chunk)
         }
     };
 
+    /// ColumnVector tries to cast the rhs column to the same type (ColumnVector) in compareAt method.
+    /// And it doesn't care about the possible incompatibilities in data types
+    /// (for example in case when the right column is ColumnSparse)
+    convertToFullIfSparse(chunk);
+
     const auto & chunk_columns = chunk.getColumns();
 
     ++rows_read;