From: | "Jose' Soares" <jose(at)sferacarta(dot)com> |
---|---|
To: | pgsql-hackers(at)postgresql(dot)org |
Subject: | Re: bug on aggregate function AVG() |
Date: | 1998-11-03 08:21:05 |
Message-ID: | 363EBCF1.77FBD969@sferacarta.com |
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Lists: | pgsql-hackers |
Jose' Soares wrote:
>
> prova=> select * from a;
> int_2| int_4| int_8
> -----+----------+-------------------
> 32767|2147483647|9223372036620802086
> 32767|2147483647|9223372036620802086
> (2 rows)
>
> prova=> select avg(int_2), avg(int_4), avg(int_8) from a;
> avg|avg| avg
> ---+---+----------
> -1| -1|-233973722
> (1 row)
>
> Jose'
The same on SUM():
prova=> select sum(int_2), sum(int_4), sum(int_8) from a;
sum|sum| sum
---+---+----------
-2| -2|-467947444
(1 row)
but it works as follow:
prova=> select avg(int_2*1.0), avg(int_4*1.0), avg(int_8*1.0) from a;
avg| avg|avg
-----+----------+-------------------
32767|2147483647|9.2233720366208e+18
(1 row)
prova=> select sum(int_2*1.0), sum(int_4*1.0), sum(int_8*1.0) from a;
sum| sum|sum
-----+----------+--------------------
65534|4294967294|1.84467440732416e+19
(1 row)
Jose'
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