Contents

• postgresql-debversion
  • About
  • Installation
  • Using
  • Copyright and License

postgresql-debversion

Debian version number type for PostgreSQL

About

Debian version numbers, used to version Debian binary and source packages, have a defined format, including specifications for how versions should be compared in order to sort them. This package implements a debversion type to represent Debian version numbers within the PostgreSQL database. This also includes operators for version comparison and index operator classes for creating indexes on the debversion type.

Version comparison uses the algorithm used by the Debian package manager, dpkg, using the implementation from libapt-pkg. This means that columns in tables using the debversion type may be sorted and compared correctly using the same logic as dpkg --compare-versions. It is also possible to create indexes on these columns.

postgresql-debversion implements the following features:

• The debversion type (internally derived from the text type)
• A full set of operators for version comparison (< <= = <> >= >) including commutator and negator optimisation hints
• Operator classes for btree and hash indexes
• The aggregate functions min() and max()

Installation

The libapt-pkg and PostgreSQL server development headers and libraries are required. See INSTALL for full instructions. In general, just do:

./configure
make
make install

or build the Debian packages using

dpkg-buildpackage -us -uc

If using PostgreSQL 9.0, which do not have support for CREATE EXTENSION, please configure with --disable-extension to use the old style config directory. Note that this release drops support for PostgreSQL 8.4 and earlier, which have broken headers (they don't allow inclusion in C++ code).

Using

Once built and installed, you can install the debversion type into your database by running the following from the psql shell (PostgreSQL 9.1 and later):

CREATE EXTENSION debversion;

If you're upgrading from an earlier version without extension support, then please run

CREATE EXTENSION debversion FROM unpackaged;

which will add all the existing types to the debversion extension. If you wish to remove it,

DROP EXTENSION debversion;

will remove debversion from the database;

Copyright and License

Copyright © 2004-2012 Roger Leigh rleigh@debian.org

debversion is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

debversion 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, see [http://www.gnu.org/licenses/].