Interface for the SQLite log writer. Redefinable options are available to tweak the output format of the SQLite reader.
See Logging To and Reading From SQLite Databases for an introduction on how to use the SQLite log writer.
The SQL writer currently supports one writer-specific filter option via
tablename sets the name of the table that is used
or created in the SQLite database. An example for this is given in the
introduction mentioned above.
String to use for empty fields. This should be different from unset_field to make the output unambiguous.