.bin.### files in /var/lib/mysql

The /var/lib/mysql directory is collecting -bin.### files. What are these? Should I be saving them?

Problem with J/Connector from tomcat

Situation: I have an app created in Forte. Its does some DB IO and dumps the results to a web page. Works great in the IDE. I export it to .war file and put it in my tomcat install. Now I get the following errormsg when I try to run it: java.sql.SQLException: Can not issue data manipulation statem