Good question :-)<p>You can do as ddorian43 explained, by including a payload in your notification (using JSON or another format).<p>Or you can do as you suggested and query the database to fetch more information about the change.<p>Apart LISTEN&#x2F;NOTIFY, which is a very powerful feature, PostgreSQL also provides &quot;logical decoding&quot; which solves problems similar to the ones solved by oplog tailing.