Creates a temporary database object that specifies a relational
       database (Format 1) or a Oracle CODASYL DBMS database instance
       (Format 2).

       Format 1

         DECLARE DATABASE  rdb-database-name  ON  root-file-spec;

       Format 2

         DECLARE DATABASE  dbms-database-name

              [USING]  [SUBSCHEMA]  subschema-name

              [OF]  [SCHEMA]  schema-path-name

              ON  root-file-spec;