Tom Lane <tgl@sss.pgh.pa.us> writes:
> How is what you're suggesting more portable?
Well, the driver would be free to implement $sth->last_insert_id() using
whatever proprietary extensions it has available. The non-portableness would
at least be hidden in the driver layer. Switch out the driver and the right
thing would happen.
"INSERT/UPDATE ... RETURNING" isn't something a driver can take advantage of.
It would require it to modify your statements which it can't do safely. So
your application would have such non-portable SQL code written into it. Switch
databases and your application code needs to be ported.
--
greg