CreateQuery moving_sum_num (children 2)
 Identifier moving_sum_num
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration k (children 1)
    DataType String
   ColumnDeclaration dt (children 1)
    DataType DateTime
   ColumnDeclaration v (children 1)
    DataType UInt64
