SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function s2CapUnion (children 1)
     ExpressionList (children 4)
      Literal UInt64_1157339245694594829
      Literal Float64_3.14
      Literal Float64_nan
      Literal Float64_3.14