Gourav Kumar <gourav1...@gmail.com> writes:
> I have the RelOptInfo data structure for the relations which are to be
> joined but when I check their joininfo, it is empty.

You aren't telling us anything much about the case you're studying,
but if the join clauses have the form of equality comparisons, they
likely got converted into EquivalenceClass data structures instead.
These days the joininfo lists only contain "unstructured" join
conditions.

                        regards, tom lane


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