Portions Copyright (c) 2015-2016, 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

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