Subject Re: [firebird-support] seems bug : Field accepts NULL Values (empty string) even if it is defined with not null constraints ??
Author Jonathan Neve
Martijn Tonies wrote:

>You're answering your own question: '' (empty string) is NOT NULL.
>NULL is NULL (empty). An empty string is a value. NULL is a state,
>so is "NOT NULL".
IMHO, this unique feature could nearly be considered a bug...

Jonathan Neve.