Other features include class invariants, non-nullable reference types, and enhanced static analysis capabilities.
Only the role field - the one that had a default value of user - passed the implicit nullable constraint.
Invalid length specified for this nullable datatype.
只有role字段—其默认值为user—通过隐含的nullable约束。
If nullable, it will contain the null value.
If the remote data source cannot handle the null value in a host variable or parameter marker, any function that involves binding a nullable value has to be evaluated locally.
newly added not nullable column(s) are involved in the primary key or unique index(constraint).
Column '%s' cannot be excluded from a vertical partition because it is neither nullable nor defined with a default value.
