I have a ODBC client which uses empty dates in its native data engine.
Unfortunately, empty data causes error if trying to store it.
This is serious Postgres limitation.
For a partial fix ODBC driver or postgres should convert empty dates to
NULLs automatically. This is better that producing error.
>> How can " " be a valid date? <<
>> You might want to reconsider your design. <<
Using your logic, I can ask: How can be 0 valid number ? If there is not
empty dates, number 0 cannot be also legal.
Empty data is a date which is less that all other dates. It can be used in
comparisons.
In contract, NULL date means that date is not entered.
Andrus Moor
"Richard Huxton" <dev@archonet.com> wrote in message
news:424A7831.6040805@archonet.com...
> Szmutku Zolt�n wrote:
>> Hi ,
>>
>> Thanks your previous help. I have a new question : how to store
>> empty value to date field ? ( I always get error message, in vain use
>> any format ) In my client be empty value for date fields (' . .
>> ') , and I would like to use NULL values and empty values also.
>
> How can " " be a valid date?
>
> You might want to reconsider your design.
> --
> Richard Huxton
> Archonet Ltd
>
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