UDTF Archives - IT Jungle

Guru: Create A UDTF Wrapper For A Stored Procedure Result Set

February 4, 2019 Michael Sansoterra

In the tip, Arranging Query Logic in DB2 for i Routines, I addressed a reader’s question about how to create a user-defined table function (UDTF) in DB2 for i that would return the same result set as an existing stored procedure. The purpose of having the UDTF would be to do additional processing on a result set, such as joining the result set with another query or dumping the result set to a temporary table for analysis. To accomplish this, I suggested moving the stored procedure query logic into a UDTF and then replace the query within the stored … “Guru: Create A UDTF Wrapper For A Stored Procedure Result Set”
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Guru: Arranging Query Logic in DB2 for i Routines

January 7, 2019 Michael Sansoterra

Hey, Mike:

We use a stored procedure to return the result set to Java and display the results to a screen. I would like to make this stored procedure put the result set into a temporary table and then do some processing on the temporary table. Is this possible and if so how can I achieve this? Thanks.

Your dilemma is understandable: stored procedure result sets are great when data needs to be returned to a client. However, once generated, the result set cannot be joined, sorted, or stored in a temporary table. Thankfully, a user-defined table function (UDTF) allows … “Guru: Arranging Query Logic in DB2 for i Routines”
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