Why would you ever extend the syslog table?
Table Guide: https://www.servicenow.com/content/dam/servicenow-assets/public/en-us/doc-type/legal/custom-table-guide.pdf
Past Post on the Table guide: ?
Post on extending syslog: https://www.servicenow.com/community/developer-forum/anyone-with-experience-extending-the-quot-syslog-quot-table/m-p/1969471
Support KB item on the syslog table: https://support.servicenow.com/kb?id=kb_article_view&sysparm_article=KB0721331
Support KB item on logging in scoped apps and their destinations (but not to extended tables): https://support.servicenow.com/kb?id=kb_article_view&sysparm_article=KB0714743
Maik’s Log Utility: https://www.servicenow.com/community/developer-articles/just-another-log-helper/ta-p/2315453
John Anderson’s decade old post on Custom Logging: http://www.john-james-andersen.com/blog/service-now/custom-logging-with-servicenow.html