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Re: chop off non-meaningful digits

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A. Kretschmer wrote:
am  Tue, dem 14.11.2006, um  0:58:56 -0500 mailte Tom Lane folgendes:
"SunWuKung" <Balazs.Klein@xxxxxxxxxxx> writes:
Yep, I think this is it:
select trim(trailing '0.' from 1.020)
Um, I think not:

regression=# select trim(trailing '0.' from 1000.000);
rtrim -------
 1
(1 row)
For this case:
test=*> select trim(trailing '.' from trim(trailing '0' from 1000.000));
 rtrim
-------
 1000

Perhaps the OP doesn't really care about this, but FWIW one thing I recall from high school science (or maybe it was middle school), the zeros to the right of the decimal place ARE meaningful, i.e., 1000.000 signifies something different than 1000, namely, a measurement three orders of magnitude more precise. So "chopping off non-meaningful digits" is something you ought to do only for zeros on the left.



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