Thank you so much, Mark. Yes, I am goning to add one more column to mytab: spid(or userid to identify the user). table in tempdb is fine, but the pb app use datawindow to get the data from mytab. I don't want to change the datawindow(otherwise, need to create a new one get data from myproc). This is possible best solution for me with minimum code change at front-end and back-end for the performance issue.
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