SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function arrayRemove (children 1)
     ExpressionList (children 2)
      Literal Array_[\'foo\', \'bar\', \'foo\']
      Function concat (children 1)
       ExpressionList (children 2)
        Function repeat (children 1)
         ExpressionList (children 2)
          Literal \'f\'
          Literal UInt64_1
        Literal \'oo\'
