Re: Is hex 00000 in a string field equal to null? -- MIDRANGE-L

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Subject: Re: Is hex 00000 in a string field equal to null?
From: James Lampert <jamesl@xxxxxxxxxxxxxxxxx>
Date: Tue, 06 Dec 2011 13:54:55 -0800
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Richard Casey wrote:

COALESCE and IFNULL only work against the null value (i.e. no data) for a
field. Having the null character (X'00') means there is actual data there.

. . . and having a NULL value in a field presupposes that the field is in fact nullable, which requires the record to have an internal null-map.

(Having dealt with this from native RLA, in MI, I can safely say that the internals get nasty.)

--
JHHL

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