The following bug has been logged online:
Bug reference: 6016
Logged by:
Email address: asuffield@acunu.com
PostgreSQL version: 9 (all)
Operating system: documentation
Description: Documentation makes inappropriate reference to boolean
logic
Details:
Documentation section 9.1 reads:
"SQL uses a three-valued Boolean logic..."
A "Boolean logic" is a specific thing, and all Boolean logics have 2^k
values; a 3-valued logic is not Boolean. Should read:
"The SQL Boolean type uses a three-valued logic..."
(Curiously, SQL99 appears to be an actual 4-valued Boolean logic)