Re: Re: [HACKERS] random() function produces wrong range

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>>>>> "Tom" == Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> writes:

Tom> Actually the odds are far better than that. If the range is
Tom> 2^31-1 then only about 2^-16th of the outputs should be less
Tom> than 2^15. So ten probes gives you a failure probability of
Tom> about 2^-160 not 2^-10.

Oops, 2^16 != 2^32 / 2.

So a dynamic test is not only possible but wouldn't cost to much at
configure time.

roland
- --
PGP Key ID: 66 BC 3B CD
Roland B. Roberts, PhD Unix Software Solutions
roberts(at)panix(dot)com 76-15 113th Street, Apt 3B
rbroberts(at)acm(dot)org Forest Hills, NY 11375

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