Dynamic calculation of values at query runtime

Question

Hello, Everybody,
I have situation in which I have calculate the value for characteristic at query runtime.
Query is based on Infoset SEMPLDATA. In Infoset I have fields u201CEmployee IDu201D, u201CBirth dateu201D, u201CAgeu201D dedicated as virtual variable, u201CNumber of Employeesu201D.
Then I execute query I enter a value for variable u201CDateu201D. After that query should calculate age for employee: for example ( variable u201CDateu201D u2013 u201CBirth dateu201D )/365. And query result is listed like this: u201CAgeu201D, u201CNumber of Employeesu201D.u201D Ageu201D is dynamic it depends on variable u201CDateu201D.
Iu2019m doubting will virtual characteristic help me. Could you give your suggestions?
Thanks in advance.
Best Regards,
Arunas Stonys

Answer 1

Hey.  You can do this with a virtual characteristic.  I'm not fond of them because of performance, but it should work.  I am also assuming you have date of birth as an available field to do the calculation.
So, you could implement code in the variable user exit.  After "Date" has been entered and the exit code is invoked you can pass that date to memory.  Something like export "date" to memory ID xxxxx.  I would create the memory ID object based on user ID running the query and date, or something like that.  Then when you are processing in the virtual characteristic user exit, just do an import from memory, referencing the same memory ID as when you exported.  Then you should be able to just do the date of birth - "date."  
I have done this in the past to be able to retain user selection information for use in the virtual object calculations.
Just thought I would add a bit more here.  You could also use formula variables based on your "Date" variable and "Date of birth" and do the calculation in a formula.  Not completely sure about your situation, but that's another idea.
Hope this helps.
Thanks
Edited by: Siboda_Eric on May 12, 2010 4:21 PM