how to modify sql after report is created

Hi experts,

I created a report, quite simple, just a matrix: as a source I used a query from sql server, where I had.

Where memberId = 123123

Because I wanted to work with a smaller set... now I finished it, and I want to remove that 'where' clause and get the full query... is there any way of editing the sql query?

the only way I see is deleting and importing all the data again....