SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function groupArrayMovingSum (children 2)
     ExpressionList (children 1)
      Literal \'x\'
     ExpressionList (children 1)
      Function CAST (children 1)
       ExpressionList (children 2)
        Literal \'0\'
        Literal \'UInt64\'
