31.03.2015 13:41, Alex Peshkoff wrote: > According to SQL specification: > > Let C be a column of a base table T. C is known not nullable if and only > if _at least one_ of the following is true: > .... <some conditions> > — C is based on a domain that has a domain constraint that is not > deferrable and that simply contains a <search > condition> that is a <boolean value expression> that is a > readily-known-not-null condition for VALUE. > .... <other condiitons follow>
Thanks, I was looking for this definition but failed to find it. In this case, I'd suggest to follow the specification. Dmitry ------------------------------------------------------------------------------ Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ Firebird-Devel mailing list, web interface at https://lists.sourceforge.net/lists/listinfo/firebird-devel
