postgresql

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History

Tom Lane d08741eab5 Restructure the key include files per recent pghackers discussion: there are now separate files "postgres.h" and "postgres_fe.h", which are meant to be the primary include files for backend .c files and frontend .c files respectively. By default, only include files meant for frontend use are installed into the installation include directory. There is a new make target 'make install-all-headers' that adds the whole content of the src/include tree to the installed fileset, for use by people who want to develop server-side code without keeping the complete source tree on hand. Cleaned up a whole lot of crufty and inconsistent header inclusions.		2001-02-10 02:31:31 +00:00
..
isbn_issn.c	Restructure the key include files per recent pghackers discussion: there	2001-02-10 02:31:31 +00:00
isbn_issn.sql.in	Update to /contrib from Karel.	2000-06-19 13:54:50 +00:00
Makefile	Add support for VPATH builds, that is, building somewhere else than in the	2000-10-20 21:04:27 +00:00
README.isbn_issn	Add missing /contrib files	2000-06-19 14:02:16 +00:00

README.isbn_issn

ISBN (books) and ISSN (serials)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

This directory contains definitions for a couple of PostgreSQL
external types, for a couple of international-standard namespaces:
ISBN (books) and ISSN (serials).  Rather than just using a char()
member of the appropriate length, I wanted my database to include
the validity-checking that both these numbering systems were designed
to encompass.  A little bit of research revealed the formulae
for computing the check digits, and I also included some validity
constraints on the number of hyphens.

The internal representation of these types is intended to be
compatible with `char16', in the (perhaps vain) hope that
this will make it possible to create indices of these types
using char16_ops.

These are based on Tom Ivar Helbekkmo's IP address type definition,
from which I have copied the entire form of the implementation.

Garrett A. Wollman, August 1998