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Re: Unexpected result using floor() function - Mailing list pgsql-general

From Frank Millman
Subject Re: Unexpected result using floor() function
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Msg-id 1083091068AD4C5FA89166F0470FDD70@FrankLaptop
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In response to Unexpected result using floor() function  ("Frank Millman" <frank@chagford.com>)
Responses Re: Unexpected result using floor() function  ("Frank Millman" <frank@chagford.com>)
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> I am running PostgreSQL 9.4.4 on Fedora 22.
>
> SELECT floor(4.725 * 100 + 0.5) returns 473, which is what I expected.
>
> SELECT floor(4.725 * power(10, 2) + 0.5) returns 472, which I find surprising.
>
> Please can someone explain the anomaly.
 
Thanks for all the responses.
 
Plenty of workarounds. I can carry on now :-)
 
Frank
 

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