This is the current list of people with access to push to the git repository. For technical details on how committing works, see Committing with Git. This is just a list of people who currently have access to push to git; for information on current and previous contributors, see the contributor profiles section of the web site.
The names are listed here in order of first commit or when added as a committer, oldest first; this isn't intended to imply anything about depth of contribution.
Hundreds of developers have successfully contributed work to PostgreSQL over decades, many acting as individuals, though also many representing academic institutions and both user and vendor companies. Both the "Author" and "Committer" fields of such patches will reflect the committer. The actual author of a patch, if different, is generally listed in the commit message; reviewers or others who contributed ideas or otherwise helped with the patch may also be listed. Many patches, in the form in which they are committed, are the work of multiple people: original author or authors, reviewer(s), and/or committer. As a result, no simple analysis of duration or depth of contribution over time is possible from the commit log. The project operates a system of careful peer review and even committers have their work checked by other committers and the community as a whole.
New committers are added approximately annually after discussions and vote among the existing committers. Contributors to PostgreSQL are selected to be committers based on the following loose criteria:
Generally, new committers are selected March or April and announced on the Hackers mailing list.
Committers who have become inactive and have not contributed significantly to the PostgreSQL project in several years are removed as committers. Again, the review process for this is approximately annual.