There are several different copyrights on the MySQL distribution: 

    1.The MySQL-specific source needed to build the mysqlclient library 
    is licensed under the LGPL and programs in the `client' directory is
    GPL. Each file has a header that shows which copyright is used for
    that file. 
    2.The client library and the (GNU getopt) library are covered by the
    ``GNU LIBRARY GENERAL PUBLIC LICENSE.'' See section L GNU LESSER
    GENERAL PUBLIC LICENSE. 
    3.Some parts of the source (the regexp library) are covered by a
    Berkeley-style copyright. 
    4.All the source in the server and the (GNU readline) library is
    covered by the ``GNU GENERAL PUBLIC LICENSE.'' See section K GNU
    GENERAL PUBLIC LICENSE. This is also available as the file `COPYING'
    in the distributions. 

   This program is distributed in the hope that it will be useful, but
   WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
   Public License for more details.

   You should have received a copy of the GNU General Public License along
   with this program; if not, write to the Free Software Foundation, Inc.,
   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

YOU MUST OBSERVE ANY AUTHORS' CONDITIONS WITH RESPECT TO
INDIVIDUAL COMPONENTS PROVIDED WITHIN THIS CODE.  SUPPORT
FOR THE TECHNOLOGIES AND DOCUMENTATION IS NOT PROVIDED
BY SUN MICROSYSTEMS, INC.

THE TECHNOLOGIES AND DOCUMENTATION ARE PROVIDED "AS IS" WITHOUT TECHNICAL
SUPPORT OR WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING,
BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.