sysssislog table in a user database How can the sysssislog table to show up in a user database's system tables?  This is for SQL server 2012.
By default, sysssislog table only exists under System Table for the System databases [msdb]. 
If you are seeing sysssislog in a user database, then you must have a package that is setup for execution logging and it creates the table in the specified database if it does not exist.