SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function sipHash64Keyed (children 1)
     ExpressionList (children 2)
      Function tuple (children 1)
       ExpressionList (children 2)
        Function CAST (children 1)
         ExpressionList (children 2)
          Literal \'2\'
          Literal \'UInt64\'
        Function toUInt64 (children 1)
         ExpressionList (children 1)
          Literal UInt64_2
      Literal UInt64_4
   ExpressionList (children 1)
    Function toUInt64 (children 1)
     ExpressionList (children 1)
      Literal UInt64_2