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Asked: 2026-05-22T17:12:52+00:00

I have the following block in my Stored procedure. It is working as expected.

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I have the following block in my Stored procedure. It is working as expected.
But I want to change it to CASE so that I can add more conditions later as reqired.

IF parm_status='ALL' THEN 
    IF op_type='CREDIT' THEN
        set v_wherestr =concat( v_wherestr, " and (tran.operation='CREDIT')");
    ELSEIF op_type='UNCREDIT' THEN
    set v_wherestr = concat( v_wherestr, " and (tran.operation='CREDIT' OR tran.operation='UNCREDIT')");
    END IF;

...
...

END IF;
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1 Answer

  1. Editorial Team

    Basically, it would be:

    IF parm_status='ALL' THEN 
    CASE op_type
       WHEN 'CREDIT' THEN set v_wherestr =concat( v_wherestr, " and (tran.operation='CREDIT')");
       WHEN 'UNCREDIT' THEN set v_wherestr = concat( v_wherestr, " and (tran.operation='CREDIT' OR tran.operation='UNCREDIT')");
    END;

...
...

END IF;

    http://www.java2s.com/Code/SQL/Flow-Control/UseCASEWHENforstringvalue.htm

    This keeps your original structure but replaces the IF THEN statements with a CASE statement. However, I would look at your actual query to see if maybe there is a more optimal way of accomplishing what you want to do. Even though this is a stored procedure, the execution plan will be a mess most likely. You might want to play around with multiple queries combined through UNION ALL or something else in order to make this more optimized. I’m sorry I can’t help you further here but it really depends on your overall query and your data structure.

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