SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 2)
    Function arraySum (alias x) (children 1)
     ExpressionList (children 1)
      Function array (children 1)
       ExpressionList (children 2)
        Function toDecimal128 (children 1)
         ExpressionList (children 2)
          Literal Float64_0
          Literal UInt64_8
        Function toDecimal128 (children 1)
         ExpressionList (children 2)
          Literal Float64_1
          Literal UInt64_8
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Identifier x