I am implementing Planner hints in Postgresql to force the optimizer to select a particular plan for a query on request from sql input. I am having trouble in modifying the planner code. I want to create a path node of hint plan and make it the plan to be used by executor. How do I enforce this ? Should I create a new Plan for this ..how to create a plan node which can be then given directly to executor for a particular query?
Planner hints have been discussed a lot before as well and AFAIK there is a wiki page that says why we shouldnt implement them. Have you referred to them?
Please share if you have any new points on the same.
