Portions Copyright (c) 2015, Kouhei Sutou
Portions Copyright (c) 2010, Itagaki Takahiro
Portions Copyright (c) 2009-2010, NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Portions Copyright (c) 1996-2010, The PostgreSQL Global Development Group
Portions Copyright (c) 1994, The Regents of the University of California

Permission to use, copy, modify, and distribute this software and
its documentation for any purpose, without fee, and without a written
agreement is hereby granted, provided that the above copyright notice and
this paragraph and the following two paragraphs appear in all copies.

IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE TO ANY PARTY FOR DIRECT,
INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST
PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
IF THE COPYRIGHT HOLDERS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

THE COPYRIGHT HOLDERS SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS" BASIS,
AND THE COPYRIGHT HOLDERS HAS NO OBLIGATIONS TO PROVIDE MAINTENANCE,
SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
