SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function damerauLevenshteinDistance (children 1)
     ExpressionList (children 2)
      Function randomString (children 1)
       ExpressionList (children 1)
        Function power (children 1)
         ExpressionList (children 2)
          Literal UInt64_2
          Literal UInt64_17
      Literal \'abc\'
