SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 2)
    Literal \'Array avg \'
    Function arrayAvg (children 1)
     ExpressionList (children 1)
      Function array (children 1)
       ExpressionList (children 6)
        Literal UInt64_1
        Literal UInt64_2
        Literal UInt64_3
        Literal UInt64_4
        Literal UInt64_5
        Literal UInt64_6