Horton

Clarify wording of foreign key documentation to mention null entries as

Bruce Momjian <bruce@momjian.us>

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Commit: f2b36d8e10b628ffe0ba73c90826c3719ea20176
Author: Bruce Momjian <bruce@momjian.us>
Date: 2011-10-12T20:58:39Z
Releases: 9.2.0 
Clarify wording of foreign key documentation to mention null entries as
not matching the primary key.

Report from Marek.Balgar@seznam.cz

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PathChange+/−
doc/src/sgml/ddl.sgml modified +1 −1