| field=field [message #22842] |
Fri, 01 November 2002 01:00  |
jann
Messages: 2
Registered: November 2002
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Junior Member |
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Todd, i think you're wrong in this issue
if value of pointer-field in that table is NULL
then compariasion : pointer=pointer DOES NOT
return TRUE , so , with this clause added
in where statement , it won't updade a row.
>>As far as the ELSE block, a WHERE
>>clause of 'pointer = pointer' is superflous (every >>row would be updated
>>with or without this condition).
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| Re: field=field [message #22851 is a reply to message #22842] |
Fri, 01 November 2002 09:33  |
Todd Barry
Messages: 4819
Registered: August 2001
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Senior Member |
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Any equality comparison assumes non-null values. Factoring in NULL values was outside the scope of this question and is a topic unto itself (IS NULL, IS NOT NULL, NVL, etc.).
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