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Re: Perl DBI NULL and undef

by BillKSmith (Priest)
on Aug 22, 2012 at 13:29 UTC ( #989036=note: print w/replies, xml ) Need Help??


in reply to Perl DBI NULL and undef

You seem to think you have three cases (a valid string, a null string, and and undefined value.) Ronald's post suggests that this is not true for DBI. Assuming that it it true, the answer to your question is to do the tests in the right order.

if (!defined){ print qq(''); } elsif (!length) { print 'NULL'; } else { print; }
Bill

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[Corion]: Yay. Traditional finance situation averted. Bonds can be quoted in amounts (1_000_000 EUR) or per unit (1 unit). And a traditional error is to trade 2_000_000 piece when you meant to trade 2_000_000 EUR.
[Corion]: (one of my scripts simply catches high amounts and I phone people making that trade, ideally before the payment is due)
[Corion]: The sad thing is that my script sits at the end of the pipeline and can only look at the payments due today or tomorrow basically, while there are many more systems further up in the pipeline
[GotToBTru]: better late than never, I guess

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