https://github.com/adjust/ajbool

triple bool for postgres
https://github.com/adjust/ajbool

adjust-kpis-team adjust-pg-extension

Last synced: 3 months ago
JSON representation

triple bool for postgres

• Host: GitHub
• URL: https://github.com/adjust/ajbool
• Owner: adjust
• Created: 2016-10-17T08:15:49.000Z (over 9 years ago)
• Default Branch: master
• Last Pushed: 2025-03-14T16:43:04.000Z (over 1 year ago)
• Last Synced: 2025-04-16T02:06:28.915Z (about 1 year ago)
• Topics: adjust-kpis-team, adjust-pg-extension
• Language: C
• Homepage:
• Size: 86.9 KB
• Stars: 6
• Watchers: 65
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: Changelog
  • Codeowners: CODEOWNERS

Awesome Lists containing this project

README

          
[![CI](https://github.com/adjust/ajbool/actions/workflows/main.yml/badge.svg)](https://github.com/adjust/ajbool/actions/workflows/main.yml)

# ajbool

A special boolean type that allows 'unknown' state without beeing NULL.

The intent is to allow a triple boolean value that can be used as PRIMARY key.

Expected intput is 't', 'f', 'u' for true, false and unknown.

Note ajbool can still be set to NULL if needed.

## usage

Typecast

```

SELECT true::ajbool, false::ajbool, NULL::bool::ajbool;

 ajbool | ajbool | ajbool

--------+--------+--------

 t      | f      | u

(1 row)

SELECT 't'::ajbool::bool, 'f'::ajbool::bool, 'u'::ajbool::bool;

 bool | bool | bool

------+------+------

 t    | f    | NULL

```

##Parallelism Support

PostgreSQL 9.6 introduced parallelism safety markings for functions.

The ajbool-00.0.1--0.0.2.sql in the extensions directory makrs these

as safe.  You should run this file after upgrading PostgreSQL.