last_login plugin with MySQL

[Joseph Tam]

Michael Cramer <michael at bigmichi1.de> writes:

> anybody knows how this can be achieved with postgresql, because 'ON
> DUPLICATE KEY UPDATE' syntax is mysql specific

A clear, concise explanation of consistency problems with SQL
update-or-insert ("upsert") operation, including a PostgreSQL
implementation:

 	http://www.depesz.com/2012/06/10/why-is-upsert-so-complicated/

Joseph Tam <jtam.home at gmail.com>