README.md

This plugin is obsolete.

Checkout new plugin: https://github.com/eendroroy/pg_semver

---

vercomp

Version Data type (VERSION) for postgresql.

It enables Version to be inserted into tables as data type (CREATE TABLE versions(version VERSION);).

Supported operations:

• =
• <>
• >
• >=
• <
• <=
• ~

  ~1.2.3 := >=1.2.3 <1.(2+1).0 := >=1.2.3 <1.3.0
  ~0.2.3 := >=0.2.3 <0.(2+1).0 := >=0.2.3 <0.3.0

• !~
• ^

  ^1.2.3 := >=1.2.3 <2.0.0
  ^0.2.3 := >=0.2.3 <0.3.0
  ^0.0.3 := >=0.0.0 <0.1.0

• !^

Example

More examples are available in test/sql directory.

CREATE TABLE versions(version VERSION);

INSERT INTO versions VALUES ('1.0.0'), ('0.0.0'), ('2.5.0-beta1'), ('2.0.0-rc1'), ('2.10.0-beta0'), 
                            ('20.2.0-alpha'), ('30.0.0'), ('3.0.0'), ('3.0.0-rc2'), ('3.0.0-rc0'),
                            ('3.0.0-beta2'), ('3.0.0-alpha0');

SELECT * FROM versions WHERE version = '1.0.0';
 version 
---------
 1.0.0
(1 row)

SELECT * FROM versions WHERE version > '2.9-beta1';
   version    
--------------
 2.10.0-beta0
 20.2.0-alpha
 30.0.0
 3.0.0
 3.0.0-rc2
 3.0.0-rc0
 3.0.0-beta2
 3.0.0-alpha0
(8 rows)

SELECT * FROM versions ORDER BY version DESC;
   version    
--------------
 30.0.0
 20.2.0-alpha
 3.0.0
 3.0.0-rc2
 3.0.0-rc0
 3.0.0-beta2
 3.0.0-alpha0
 2.10.0-beta0
 2.5.0-beta1
 2.0.0-rc1
 1.0.0
 0.0.0
(12 rows)

2 versions can also be compared without inserting into any table:

SELECT VERSION_CMP('0.0.0', '0.0.1');
 version_cmp 
---------
      -1
(1 row)

SELECT VERSION_CMP('0.0.1', '0.0.1');
 version_cmp 
---------
       0
(1 row)

SELECT VERSION_CMP('0.0.2', '0.0.1');
 version_cmp 
---------
       1
(1 row)

Installing by compiling source code

Prerequisites

Ubuntu:

# add postgres repo
add-apt-repository 'deb http://apt.postgresql.org/pub/repos/apt/ xenial-pgdg main'
wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -

# install postgres
apt-get -y update
apt-get -y install postgresql postgresql-contrib libpq-dev postgresql-server-dev-all

# install build requirements
apt-get -y install make build-essential

RHEL:

yum -y install openssl-devel

# add postgres repo
rpm -Uvh https://yum.postgresql.org/10/redhat/rhel-7-x86_64/pgdg-centos10-10-2.noarch.rpm

# install postgres
yum -y install postgresql10-server postgresql10-libs postgresql10-devel postgresql10-contrib

# initialize databasse
/usr/pgsql-10/bin/postgresql-10-setup initdb

Build

make
make install

If you encounter an error such as:

make: pg_config: Command not found

Be sure that you have pg_config installed and in your path. If you used a package management system such as RPM to install PostgreSQL, be sure that the -devel package is also installed. If necessary tell the build process where to find it. Edit Makefile, and change PG_CONFIG variable:

PG_CONFIG=/path/to/pg_config

followed by the

make
make install

pg_config is usually under /usr/pgsql-10/bin/pg_config on RHEL/CentOS/Fedora. Replace 10 with your major PostgreSQL version.

Alternatively the following will work too:

PATH="/usr/pgsql-10/bin:$PATH" make
sudo PATH="/usr/pgsql-10/bin:$PATH" make install
PATH="/usr/pgsql-10/bin:$PATH" make installcheck

Using the module

To enable this module, add '$libdir/vercomp' to shared_preload_libraries in postgresql.conf, then restart the server.

Testing

Using vagrant:

vagrant up
vagrant provision --provision-with install

Contributing

Bug reports and pull requests are welcome on GitHub at pg_vercomp repository. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

1. Fork it ( https://github.com/eendroroy/pg_vercomp/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request

Author

• indrajit - Owner - eendroroy

License

The project is available as open source under the terms of the MIT License.