INITIALIZE-DATABASE-TYPE — Initializes a database type
Function
database-typeThe database type to initialize, i.e. a keyword symbol denoting a known database back-end. Defaults to the value of *default-database-type*.
Either NIL if the initialization
            attempt fails, or t otherwise.
If the back-end specified by
	database-type has not already been
	  initialized, as seen from
	  *initialized-database-types*, an attempt is 
	  made to initialize the database.  If this attempt succeeds,
	  or the back-end has already been initialized, the function
	  returns t, and places the keyword denoting the database type 
	  onto the list stored in
	  *initialized-database-types*, if not
	  already present.
If initialization fails, the function returns
	  NIL, and/or signals an error of type
	  clsql-error.  The kind of action
	  taken depends on the back-end and the cause of the
	  problem.
*initialized-database-types* => NIL (setf *default-database-type* :mysql) => :MYSQL (initialize-database-type) >> Compiling LAMBDA (#:G897 #:G898 #:G901 #:G902): >> Compiling Top-Level Form: >> => T *initialized-database-types* => (:MYSQL) (initialize-database-type) => T *initialized-database-types* => (:MYSQL)
The database back-end corresponding to the database type
	  specified is initialized, unless it has already been
	  initialized.  This can involve any number of other side
	  effects, as determined by the back-end implementation (like
	  e.g. loading of foreign code, calling of foreign code,
	  networking operations, etc.).  If initialization is
	  attempted and succeeds, the
	  database-type is pushed onto the list 
	  stored in
	  *initialized-database-types*.