Hello everyone, I am implementing some functionality into Postgresql, where I want to track which row was accessed by a user query. I am implementing the functionality inside Postgres, so that there are no changes required on client side (e.g. re-writing queries). Rows are identified by OIDs, and I have set default_with_oids=true, so that all tables are created with OIDs.
Now, when I run a 'select * from my_table', I can easily get the OID inside the executor because I get a 'HeapTuple' from ExecSan(). I call HeapTupleGetOid() on the heap tuple and I have the oid. The problem is that when I run a query with a projection, e.g., 'select name from my_table', then the scanner returns a null HeapTuple. How can I get the OID in such a case? What would be the best way of doing this? Should I modify the planner to add 'get oid' as a junk filter? Would it affect something else? Any comments will be highly appreciated. Thanks! -- Sent via pgsql-hackers mailing list (firstname.lastname@example.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers