I have run DBD and deployed it's recommendations . However, i'm working on creating customized projections to see if my queries could get extra performance gain. I find customized projections to be ultrafast provided i access them directly (not referring to base table)but i don't know how to force optimizer to access customized projections created by me when i directly refer to base table. Any pointers on tips to make optimizer use customized projections? thanks for your help in advance.