In "join_selectivity" function (plancat.c), a function call is made to "OidFunctionCall4" (fmgr.c), which in turn calls a function pointer.
In need to know what is the actual function being called from OidFunctionCall4 if the selectivity of mergejoin is the one required from join_selectivity. Thanks ---------------------------(end of broadcast)--------------------------- TIP 4: Don't 'kill -9' the postmaster
