CreateQuery collate_test2 (children 3)
 Identifier collate_test2
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration x (children 1)
    DataType UInt32
   ColumnDeclaration s (children 1)
    DataType Array (children 1)
     ExpressionList (children 1)
      DataType LowCardinality (children 1)
       ExpressionList (children 1)
        DataType Nullable (children 1)
         ExpressionList (children 1)
          DataType String
 Storage definition (children 1)
  Function Memory (children 1)
   ExpressionList