https://github.com/michelp/pgfsm

Simple SQL finite state machine for Postgres
https://github.com/michelp/pgfsm

Last synced: 7 months ago
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Simple SQL finite state machine for Postgres

• Host: GitHub
• URL: https://github.com/michelp/pgfsm
• Owner: michelp
• License: cc0-1.0
• Created: 2016-04-17T18:40:44.000Z (about 10 years ago)
• Default Branch: master
• Last Pushed: 2025-05-14T01:01:08.000Z (about 1 year ago)
• Last Synced: 2025-05-14T02:53:13.200Z (about 1 year ago)
• Language: Python
• Homepage:
• Size: 825 KB
• Stars: 70
• Watchers: 3
• Forks: 8
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# pgfsm

Simple SQL finite state machine for Postgres

This is some example code on how to store a simple state machine in

SQL.

There are two tables, fsm.machine and fsm.transition.  The machine

table has insert and update triggers to ensure that every row is in a

valid state.  The transition table is where transition between states

are defined.

There is a pgtap test in test.sql that illustrates the technique.