Dmitry Chichkov <dchichkov@gmail.com> writes:
> It seems like during fdwPlan(..., RelOptInfo *baserel) stage I'm getting
> baserel->baserestrictinfo, in which I see a Node *x of IsA(x, Param).
> But it looks like the value 'abc123' is not yet available in the planning
> stage, right? And I don't see how can I get baserestrictinfo in the
> execution stage or if the 'abc123' value would be there...
If you are trying to get an estimated value for some subexpression at plan
time, estimate_expression_value() is what to use; see for example the uses
of that function in selfuncs.c. Keep in mind that it *is* an estimate and
cannot be guaranteed to still be correct at execution time, since the plan
might be re-used with another parameter value.
regards, tom lane