how to customize autogeneraion id


      How to autogenerate id in the following format Rk_Jk_A10000

you have to create something manually yourself.

Hi Kartik,

Why do you want such id to be generated ? 

You can do one thing you can keep additional column in your entity and once your records get created with the primary key for example 1000 you can raise a trigger or update the column by adding some prefix to the primary key like RJ_JK_A{Primarykey} and can use that column wherever you want.