SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function base58Encode (children 1)
     ExpressionList (children 1)
      Identifier val
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 1)
          ExpressionList (children 1)
           Function arrayJoin (alias val) (children 1)
            ExpressionList (children 1)
             Literal Array_[\'\', \'f\', \'fo\', \'foo\', \'foob\', \'fooba\', \'foobar\']