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BUG #2093: SUM of timeintervals, no problems in 8.0.3

From: "Bjrn Sjlenius" <salvium(at)gmail(dot)com>
To: pgsql-bugs(at)postgresql(dot)org
Subject: BUG #2093: SUM of timeintervals, no problems in 8.0.3
Date: 2005-12-04 10:33:42
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Lists: pgsql-bugs
The following bug has been logged online:

Bug reference:      2093
Logged by:          Bjrn Sjlenius
Email address:      salvium(at)gmail(dot)com
PostgreSQL version: 8.1
Operating system:   OpenBSD 3.8
Description:        SUM of timeintervals, no problems in 8.0.3

Just upgraded fron 8.0.5 to 8.1, and a function where I summerize logon time
now give quite odd result. Duplicated the problem;

----------------- Commands to execute ------------------
createdb test
psql test

CREATE TABLE activity_tab (
    nick character varying(32),
    logon timestamp with time zone,
    logoff timestamp with time zone

COPY activity_tab (nick, logon, logoff) FROM stdin USING DELIMITERS '|';
apa|2005-11-01 00:00:00+01|2005-11-01 23:00:00+01
apa|2005-11-02 00:00:00+01|2005-11-02 23:00:00+01
apa|2005-11-03 00:00:00+01|2005-11-04 23:00:00+01

SELECT LOWER(nick) AS "nick", SUM(logoff-logon) AS "time"
FROM activity_tab


dropdb test

----------------- End of commands ------------------

The result I get;
 nick |      time      
 apa  | 1 day 69:00:00

Expected result is what 8.0.3 give me;
 nick |      time      
 apa  | 3 days 21:00:00

Hope you can help! And a BIG THANKYOU for your great work!

Best regards, Bjrn


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