Which solution is better

Question

Hi all ,
I have a table callled preference (usr_id, pref_cd,prod_cd,prod_Fam_cd,updated_date)
user who logs in to the application will set the preference for a product ..
Now Java team wants me to create a stored procedure that accepts array of preference objects(each preference object contains all the fields of preference table) and I have to update/insert the preference table .
I have created the procedure.
But my question is Is this a good way ? cant java code directly access the table tot do this ? why to make it complex to create a stored procedure and create table types and object types which is additional maintenance.
Plz suggest which is the better approach?

Answer 1

raj_fresher wrote:
now I write a function to perform this and this function will have to return some success code(say 0) to the java program if the inserts and updates are successful else i will have to return some failure code (say 1)1) I assume you really mean that you are creating a stored procedure to do the DML, right? Functions should not do DML.
2) Why do you need to return a status code? It is generally far preferrable to throw an exception if a procedure fails than to force every caller of the procedure to add code to check the status code after every call.
Now what condition i have to test for a success or failure when writing a function ?
I used Merge command to insert a record if it is not present or update the record if it is present.
Now I will always pass success only right .... what failure condition should i be checking on in the procedure?The condition you have to test for depends on your requirements. What constitutes success? If doing a merge is appropriate, presumably the Java code doesn't care whether rows were inserted or updated. So success may be that the MERGE statement ran without throwing an exception.
secondly , if it is an oracle error how do i pass on the exception to the java code which is calling this proc?If your procedure throws an exception, that exception will automatically propagate to the Java code. The Java code will get a SQLException with the stack trace and error information.
Justin