i tested the random thing and it seems to do something strange. i have
the following table set up:
| idx | c |
|-----|--- |
| 0 | o |
| 1 | a |
| 2 | b |
| 3 | c |
----------
i do the following:
select c from charkey where idx=((4 * random())::int)%4;
sometimes i get one character back (which is good), but other times, i
get two characters or none.
by the way, i am using postgres 7.2 on freebsd 4.8.
Peter Choe
Dennis Gearon wrote:
> then do ( ( 6 * random() )::int ) % 6
>
> Bruno Wolff III wrote:
>
>> On Tue, Apr 01, 2003 at 11:26:47 -0500,
>> Peter Choe <choepete@mindspring.com> wrote:
>>
>>> thanks. i just tried it out and it seems that it would generate a
>>> random number between 0 and 1. is that a valid assumption? if that
>>> is the case, how can i cast it to an int value? i assume that there
>>> is a cast function somewhere, but i can't tell by the names of the
>>> pronames.
>>
>>
>>
>> Normally you multiply by the range you want and then you can make a
>> cast.
>> Note however, that multiplication may cause a value to round up so that
>> (6*random())::int might on very rare occasions return 6 instead of the
>> expected 0, 1, 2, 3, 4 or 5. (At least on some systems.)
>>
>>
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>
>
