This optional parameter specifies a maximum message length (in
characters) for each message to be logged. If specified, each log message
is truncated to the specified number of characters prior to logging.
Defaults to 0, which means no truncation.
Truncation is done prior
to SQL quoting of escapes. MaxMessageLength is useful for some types of
SQL server that complain if given a string longer than the column it is
going in to.