Thank you for the reply! I'm trying to get the correct value and I need it
at the execution stage. I just don't see how to get baserestrictinfo in
the execution stage or if the 'abc123' value would be there at all...
On Fri, Sep 25, 2015 at 11:44 AM, Tom Lane <t...@sss.pgh.pa.us> wrote:
> Dmitry Chichkov <dchich...@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