Accessing base table relational names via RelOptInfo

Hi,

I hope this is the appropriate list to send this to.

*Context:*

I (grad student) am trying to insert my own cardinality estimates into the
optimizer

*What I need to do to get there:*

I want to be able to programmatically access the relation names inside from
inside the calc_joinrel_size_estimate method (in costsize.c) using the
RelOptInfo
*outer_rel, RelOptInfo *inner_rel arguments. I'm pretty sure I need to use
the Relids relids variables in the RelOptInfo struct but I'm not sure where
to go from there.

Any help would be much appreciated

Best, Walter