BUG in 7.1.3

I think I  have found a bug in version 7.1.3. (I have installed  binary
rpms from postgres site on rh7.1)

Here is the DB and some sample entries.


CREATE TABLE "timetest" ("id" serial primary key,"timebegin" time,"timeend" time);

insert into timetest (timebegin,timeend) values ('12:00:20','12:01:00');
insert into timetest (timebegin,timeend) values ('14:00:20','14:02:00');
insert into timetest (timebegin,timeend) values ('15:00:00','15:00:40');

WORKS


THIS SELECT DOESN'T WORK: 
select  sum(timeend-timebegin) as totaltime from timetest;

HERE IS WHAT POSTGRES REPORT:

timetest=# select  sum(timeend-timebegin) as totaltime from timetest;
ERROR:  Unable to select an aggregate function sum(time)
timetest=# select version();                          version                           
-------------------------------------------------------------PostgreSQL 7.1.3 on i686-pc-linux-gnu, compiled by GCC
2.96
(1 row)

timetest=#

ON POSTGRES 7.0.3
timetest=# select  sum(timeend-timebegin) as totaltime from timetest;totaltime 
-----------00:03
(1 row)

timetest=# select version();                          version                           
-------------------------------------------------------------PostgreSQL 7.0.3 on i686-pc-linux-gnu, compiled by gcc
2.96
(1 row)

ascor=# 

Hope this can help to fix the BUG!

Alex