Re: FW: "=" operator vs. "IS"
От | Rich Hall |
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Тема | Re: FW: "=" operator vs. "IS" |
Дата | |
Msg-id | 40E17C81.3090308@micropat.com обсуждение исходный текст |
Ответ на | FW: "=" operator vs. "IS" ("Dmitri Bichko" <dbichko@genpathpharma.com>) |
Ответы |
Re: FW: "=" operator vs. "IS"
Re: FW: "=" operator vs. "IS" Re: FW: "=" operator vs. "IS" Re: FW: "=" operator vs. "IS" |
Список | pgsql-sql |
My question is why is the form "(anything) = NULL" allowed? Since "(anything) = NULL" is always Null, this cannot be what the coder intended. This is much different when comparing two variables, where the coder may have to handle the cases where the variables areNull. Here the comparison is to a constant. Rick
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