Question

I have created a user type in oracle

create or replace type my_array_list 
is
table of 
varchar2(100);

Now i have written a procedure which has a output parameter like this :

   type my_list_rec IS record
   (
      best_friends my_array_list,
      good_friends my_array_list
   );


   type my_list_array is table of my_list_rec;

  procedure friends_diff_prc(my_name in varchar2,
                                     my_friend_list_o   out my_list_array ,
                                     rc_o                  out number); 

Now i am calling this proc through my JAVA Class which is extending StoredProcedure.

// Declare output parameter
 declareParameter(new SqlOutParameter(
                PropertiesReader
                        .getPropertyValue(FRIENDSConstants.GET_FRIEND_LIST_OUT),
                OracleTypes.ARRAY,"MYDB.MY_ARRAY_LIST"));

But when i am calling a proc , i am getting

org.springframework.jdbc.BadSqlGrammarException:

Am i declaring an OUT Parameter correctly??
And how i can parse the contents of that output parameter?

Thanks in advance.

Answer 1

Your example is strikingly confusing. You have purposefully named two types that are very different with very similar name:

• my_array_list is a SQL type: a nested table of VARCHAR2
• my_list_array is a PL/SQL type: a table of record of my_array_list

PL/SQL and SQL types are physically very different. For example, PL/SQL types can’t be accessed directly through jdbc.

Furthermore, the two types are logically very different: I can’t see how you can imagine to map the first type to the second. The second type is a collection of objects of the first type, you will never be able to swap the two types, ever.

I suggest the following:

1. don’t name types that are very different with confusingly similar name.
2. create a wrapper procedure with SQL Objects around your PL/SQL procedure to be able to call it from jdbc.
3. see this SO for an example of calling a procedure with a SQL table as an OUT parameter: Fetch Oracle table type from stored procedure using JDBC.