Parsing through the list of PostgreSQL 9.0 release notes, we counted how many contributions each developer named made to get this release up and going. Top contributor by large is Tom Lane, who we also found in previous studies to be one of the most active and central members of the project. Surprisingly, we also see this time that many contributions to the latest version have been made by developers outside the core member team – demonstrating that the project is once again successful in attracting members from the open source community.

Parsed from http://developer.postgresql.org/pgdocs/postgres/release-9-0.html

What were their contributions about?

Tom Lane:

Peter Eisentraut:

Bruce Momjian:

Who contributed the most overall?

Here is the list, ordered by most contributions:

66 Tom Lane
25 Peter Eisentraut
19 Itagaki Takahiro
16 Robert Haas
16 Bruce Momjian
9 Pavel Stehule
7 Tim Bunce
7 Teodor Sigaev
7 Boszormenyi Zoltan
5 Andrew Dunstan
4 Michael Meskes
4 Magnus Hagander
4 Heikki Linnakangas
4 Fujii Masao
4 Andrew Gierth
3 Simon Riggs
3 Petr Jelinek
3 Joachim Wieland
3 Andres Freund
2 Roger Leigh
2 Leonardo F
2 Kurt Harriman
2 KaiGai Kohei
2 John Naylor
2 Hitoshi Harada
2 Greg Stark
2 Caleb Welton
2 Bernd Helmle
2 Alvaro Herrera
2 Alex Hunsaker
1 Zdenek Kotala
1 Tsutomu Yamada
1 Tollef Fog Heen
1 Taro Minowa Higepon
1 Steve Prentice
1 Stef Walter
1 Sergey Karpov
1 Robert Fleming
1 Nobuhiro Iwamatsu
1 Michael Paquier
1 Marko Tiikkaja
1 Marko Kreen
1 Mark Cave-Ayland
1 Marcus Kempe
1 Laurenz Albe
1 Khee Chin
1 Kevin Grittner
1 Joshua Tolley
1 Jim Cox
1 Jeremy Kerr
1 Jeff Davis
1 Hiroshi Inoue
1 Hannu Valtonen
1 Guillaume Smet
1 Guillaume Lelarge
1 Greg Smith
1 Greg Sabino Mullane
1 Emmanuel Cecchet
1 Distinguished Name
1 Dean Rasheed
1 Dave Page
1 Damien Clochard
1 Craig Ringer
1 Brendan Jurd
1 Alexey Klyukin
1 Abhijit Menon-Sen

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