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Re: float8 comparison failure

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Radek Kanovsky <rk(at)dat(dot)cz>
Cc: pgsql-bugs(at)hub(dot)org
Subject: Re: float8 comparison failure
Date: 2000-07-28 15:16:15
Message-ID: 29776.964797375@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-bugs
Radek Kanovsky <rk(at)dat(dot)cz> writes:
> [ float8 values that appear equal are not always equal ]

This is not a bug, it's an inherent consequence of the inaccuracy of
floating-point math.  Use some other data type (numeric, maybe) if
you expect to be able to do exact equality comparisons.

			regards, tom lane

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