schambers/fluentmigrator — pull request #418 by vgrigoriu (2013-05-27 16:41:30+00:00)
Title: Oracle generators should output NULL when a column is explicitly nullable

Currently there is no way in Oracle to change the nullability of a not-nullable column.
If I say

Alter.Column("Col1").OnTable("Table1").AsString(20).Nullable();

I expect the Oracle generator to output:

ALTER TABLE Table1 MODIFY Col1 NVARCHAR2(20) NULL