| Subject | Re: [firebird-support] COALESCE() + CAST() converts timestamp format |
|---|---|
| Author | Venus Software Operations |
| Post date | 2014-05-13T09:05:13Z |
Kind regards
Bhavbhuti
>Thanks Svein. Would you suggest I double COALESCE it? I think it will be an overkill and I might end up with an ANSI datetime again.
>Or should I not COALESCE it at all? I wanted a blank date time in case of a NULL for tBillDt and if there is a date in tBillDt I need
>it for date calculation later on as post processing from the front ends.
What is a blank date, Bhavbhuti? Either it is NULL (unknown) or an actual date. Blank as in '' is a (var)char concept, it doesn't exist for dates or timestamps and give an error. So you basically have to choose between having a date for calculation or a string for display.
If you're thinking in terms of WHERE clauses, you may sometimes use IS [NOT] DISTINCT FROM as an alternative to = or <>.
HTH,
Set
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