A Join clause/predicate will only mention 2 relations. It can't have 3 or more relations.
On 12 October 2017 at 23:14, Tom Lane <t...@sss.pgh.pa.us> wrote: > Gourav Kumar <gourav1...@gmail.com> writes: > > My objective is to construct join graph from a given query. > > A join graph, has a node for each relation involved in a join, and an > edge > > between two relations if they share a join predicate among them. > > Hm, well, you could adapt the logic in have_relevant_joinclause() and > have_relevant_eclass_joinclause(). Or maybe you could just use them > as-is ... depends on what you have in mind to do with join clauses > that mention 3 or more relations. > > regards, tom lane > -- Thanks, Gourav Kumar Computer Science and Automation Indian Institute of Science
