The Oracle back-end requires the Oracle OCI client
      library. (libclntsh.so).  The location of
      this library is specified relative to the
      ORACLE_HOME value in the operating system
      environment.
      
	CLSQL has tested sucessfully using the client library from
	Oracle 9i and Oracle 10g server installations as well as
	Oracle's 10g Instant Client library. For Oracle 8 and earlier
	versions, there is vestigial support by pushing the symbol
	:oci7 onto cl:*features*
	prior to loading the clsql-oracle ASDF
	system.
	
(push :oci7 cl:*features*) (asdf:operate 'asdf:load-op 'clsql-oracle)
Use
(asdf:operate 'asdf:load-op 'clsql-oracle)
to load the Oracle back-end. The database type for the Oracle back-end is :oracle.
            The userenv operator is Oracle specific. 
          
            Oracle does not support the except
            operator. Use minus instead.
          
            Oracle does not support the all,
            some, any
            subquery operations.
          
            By default, CLSQL starts in transaction AUTOCOMMIT mode
            (see set-autocommit).
            To begin a transaction in autocommit mode, start-transaction
            has to be called explicitly.