GETANSINULL (Transact-SQL)
SQL Server 2008 R2
Returns the default nullability for the database for this session.
When the nullability of the specified database allows for null values and the column or data type nullability is not explicitly defined, GETANSINULL returns 1. This is the ANSI NULL default.
To enable the ANSI NULL default behavior, one of these conditions must be set:
ALTER DATABASE database_name SET ANSI_NULL_DEFAULT ON
SET ANSI_NULL_DFLT_ON ON
SET ANSI_NULL_DFLT_OFF OFF