We have planner method parameters for many important parts of the planner. We don't have any parameter for join removal, AFAIK.
The first question I get asked is "can I see the tables it removed?". This has been asked of me 3 times now this year, always first question. Same issue applies to constraint exclusion. But we *can* do this with constraint_exclusion, simply by turning it off and checking the two outputs. So I think we need a parameter for join removal also. I don't want to turn it off, but I think we need a way for people to check themselves that the removal of the joins is not an error. I foresee many false bug reports along the lines of "optimizer ate my join and I want it back". -- Simon Riggs www.2ndQuadrant.com -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
