ORA-06502: PL/SQL: numeric or value error: character string buffer too small exception from C# code

Question

I am trying to execute some oracle pl/sql procedure with in and out parameters from # code on asp.net. I want to retrive the value from out parameter. but when I execute i am ge

Answer 1

It is working for me now. Mistake is I have declared a parameter "Id" as varchar2. but I didn't give any size to that. Now I have declared max size to the parameter and its working fine.

 cmd_chk.Parameters.Add("id", OracleDbType.Varchar2,32767).Direction = ParameterDirection.Output;

Answer 2

Faced the same issue when declaring out put value as Varchar2. Adding a Size property to Parameter solved the issue.

command.CommandType = CommandType.StoredProcedure;
command.CommandText = "function_name";    
command.Parameters.Add(new OracleParameter
                        {
                            ParameterName = "result",
                            Size = 1,
                            Direction = ParameterDirection.ReturnValue,
                            OracleDbType = OracleDbType.Varchar2
                        });

Answer 3

Can you try with anchored datatype like %type.
syntax :- tablename.colname%type.

Answer 4

you need to increase the size of u_id

u_id varchar2(4000);

Answer 5

The problem originates from using Char which is a fixed length string. Not sure where, but somewhere in your code you try to put a Char or varchar2 string of length N into a char of lengh M where M > N.

Answer 6

Another strage thing we RAN into related to this is with Oracle functions, for the special ParameterDirection.ReturnValue (*** all the rest of the ParameterDirection will work)

if you decalre it like bellow, directly in the constructor it DOSEN'T work:

cmd.Parameters.Add(new OracleParameter("myretval", OracleDbType.Long, 10, ParameterDirection.ReturnValue));

Result in error like:

ORA-06502: PL/SQL: numeric or value error: character string buffer too small
ORA-01403: no data found
ORA-06512: at line 1

if you declare it like this it works:

OracleParameter retval = (new OracleParameter("myretval", OracleDbType.Long, 10);
            retval.Direction = ParameterDirection.ReturnValue;
            cmd.Parameters.Add(retval);