Many thanks for your help, Michael!

You are so kind to me even with this trivial question.

Regards,

On Thursday, April 16, 2015 at 9:38:38 AM UTC+7, Khoa Nguyen Minh wrote:
>
> Hi everyone,
>
> Could you please tell me whether SQLAlchemy 0.8.2 supports NULL value when 
> using version_id_col? Currently, the correspond SQL emitted when 
> updating/deleting is:
>
> *where [version_column] = NULL*
>
> That always raises StaleDataError exception. Is there a way we can emit 
> custom SQL so that when the original value is NULL then the emitted SQL 
> will be:
>
> *where [version_column] is NULL*
>
> and in normal case, the emitted SQL will be:
>
> *where [version_column] = [value]*
>
> Also, I think that if SQLAlchemy provides the custom version_id_generator 
> then why it doesn't support *custom version_id_col where clause when 
> updating/editing*?
>
> Really appreciate your helps,
>
> Khoa Minh Nguyen
>

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