SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function groupArrayMovingAvg (children 2)
     ExpressionList (children 1)
      Literal \'x\'
     ExpressionList (children 1)
      Function CAST (children 1)
       ExpressionList (children 2)
        Literal \'0\'
        Literal \'Int64\'
