When are changes to a database recorded? Are any temporary files used?

When are changes to a database recorded? Are any temporary files used?

As implemented by Base, changes made to a HSQL database are silently recorded directly to the database files. Even when the database is embedded in an .odb file, any changes are written directly to the .odb file. It is not true that changes are written to temporary files (or held in memory) until the user exits from base, and only then written to the .odb file, despite what some people have guessed.