Simon Riggs <simon@xxxxxxxxxxxxxxx> writes: > I was thinking that we would fill out the OpExpr with different > opclasses for each plan, so each one sees a different story. (I was > thinking there was a clauselist for each plan; if not, there could be.) This is backwards: there isn't a plan yet. If there were, having clauselist_selectivity return different answers depending on what index the plan was thinking of using would still be wrong. > [BTW how do you add new indexes to system tables? I want to add one to > pg_inherits but not sure where to look.] src/include/catalog/indexing.h Offhand I think adding a new entry is all you have to do. You may also want a syscache to go with it, which'll take a bit more work. regards, tom lane
