Hi @praveen.gp,
Unfortunately, the ‘regex’ function, or something similar to, is still a feature limitation in Quick Sight. I had suggested a few work arounds in regards to regex functions at the post below:
If you could explain your scenario that requires this function a bit more in depth, what you’re trying to complete and what an ideal outcome is, I can try and suggest additional work arounds that could be used.
Additionally, I’ll keep this tagged as a feature request to promote visibility to the support team.