This enhancement wraps a utility layer on
*commands*table in database.
When an enhanced relational-database is called with a symbol which
matches a name in the
*commands* table, the associated
procedure expression is evaluated and applied to the enhanced
relational-database. A procedure should then be returned which the user
can invoke on (optional) arguments.
*initialize* is special. If present in the
will return the value of the
*initialize* command. Notice that
arbitrary code can be run when the
*initialize* procedure is
automatically applied to the enhanced relational-database.
Note also that if you wish to shadow or hide from the user
relational-database methods described in Database Operations, this
can be done by a dispatch in the closure returned by the
*initialize* expression rather than by entries in the
*commands* table if it is desired that the underlying methods
remain accessible to code in the