Hello, Would you mind giving me some pointers on *creating parenthesis while building a RelNode*. For example, how to build RelNode for the sample query: SELECT * FROM `persons` WHERE *(*`SALARY` >= 10 AND `SALARY` < 20*) *OR *(*`SALARY` >= 30 AND `SALARY` < 40*)*
P.S. Need to know how to build the parenthesis only, everything else is fine.. -- Thanks & Regards, Rakesh
