SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function addMicroseconds (children 1)
     ExpressionList (children 2)
      Function toDateTime64 (children 1)
       ExpressionList (children 2)
        Literal \'1980-12-12 12:12:12.123456\'
        Literal UInt64_6
      Literal UInt64_1