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Re: BUG #6016: Documentation makes inappropriate reference to boolean logic

From: Bruce Momjian <bruce(at)momjian(dot)us>
To: asuffield(at)acunu(dot)com
Cc: pgsql-bugs(at)postgresql(dot)org
Subject: Re: BUG #6016: Documentation makes inappropriate reference to boolean logic
Date: 2011-05-10 01:04:37
Message-ID: 201105100104.p4A14bA24308@momjian.us (view raw or flat)
Thread:
Lists: pgsql-bugs
asuffield(at)acunu(dot)com wrote:
> 
> The following bug has been logged online:
> 
> Bug reference:      6016
> Logged by:          
> Email address:      asuffield(at)acunu(dot)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)

Attached patch applied to HEAD and 9.0.X.

-- 
  Bruce Momjian  <bruce(at)momjian(dot)us>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

  + It's impossible for everything to be true. +

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