In MySQL, I was able to leverage a combination Unique Key with the REPLACE statement to create a table that had circular rows of data per user. With this, no user would have more than say 100 rows of logs in the table. Basically, I leveraged the ideas from http://dt.deviantart.com/journal/Build-Your-Own-Circular-Log-with-MySQL-222550965
The REPLACE/UPSERT in HANA doesn't use Unique Keys. Does anyone have an example of how a circular log table for multiple users could be created in HANA?