Helpful tips

How to return result set in db2 stored procedure?

How to return result set in db2 stored procedure?

To return a result set from an SQL procedure:

  1. Specify the DYNAMIC RESULT SETS clause in the CREATE PROCEDURE statement.
  2. DECLARE the cursor using the WITH RETURN clause.
  3. Open the cursor in the SQL procedure.
  4. Keep the cursor open for the client application – do not close it.

Can a stored procedure return a result set?

In addition to returning output parameters, a stored procedure can return a result set (that is, a result table associated with a cursor opened in the stored procedure) to the application that issues the CALL statement. The application can then issue fetch requests to read the rows of the result set cursor.

How do I create a stored procedure in DB2?

Set up the workbench environment for stored procedure development. Connect to the GSDB sample database and create a data development project to work with the database. Create an SQL stored procedure. Deploy, debug, and run the stored procedure from the workbench.

How do you call a procedure in DB2?

You can call stored procedures by using the CALL statement from the DB2® command line processor interface. The stored procedure being called must be defined in the DB2 system catalog tables.

Can we call function from stored procedure?

A function can be called in a select statement as well as in a stored procedure. Since a function call would return a value we need to store the return value in a variable.

How do I run a stored procedure in DB2 LUW?

A stored procedure is unusable until it is defined. Use the CREATE PROCEDURE command to do this. You can either use the DB2 command prompt or place the command in a program and compile and run it. If you use the DB2 command prompt, you first connect to the DB2 LUW Server where the stored procedure will be executed.

What is stored procedure in DB2?

A stored procedure is a compiled program that can execute SQL statements and is stored at a local or remote Db2 server. You can invoke a stored procedure from an application program or from the command line processor.

How to process result sets in a DB2 procedure?

In DB2, a stored procedure can process result set (s) returned by another stored procedure using RESULT_SET_LOCATOR type, ASSOCIATE RESULT SET LOCATORS and ALLOCATE CURSOR FOR RESULT SET statements. In Oracle you can use SYS_REFCURSOR type to pass result sets between stored procedures. Last Update: DB2 10.1 and Oracle 11g R2.

When to use Result sets as cursors in DB2?

Section D –Process and close the cursors. Once the result sets have been “allocated” as cursors, they can be used like a normal cursor within the program. When ALLOCATE CURSOR is used, an explicit OPEN cursor statement is not required (because technically the stored procedure itself opens the cursor).

How to process a stored procedure in Java?

You write a stored procedure to return one or more sophisticated result sets to a Java or .NET client. Everyone is (temporarily) happy. Eventually, a need arises for an RPG or COBOL program to execute this stored procedure and process the result set (s).

How to process procedure result sets as cursors?

And here’s an RPG program that will execute the procedure, open the result sets as cursors, and block fetch the first 500 rows from each cursor into data structure arrays: