Data type for SQL Server for DbType.String

[beppler]

On DbTypes x SqlServer is documented that the types generated for DbType.String are the following:

• nvarchar(255) if precision is not specified
• nvarchar(n) if precision is between 1 and 8000
• text if precision greater than 8000

Based on SQL Server Data Type Mappings the type used for String should be:

• nvarchar(255) if precision is not specified (to remain compatible with previous behavior)
• nvarchar(n) for precision between 1 and 4000
• nvarchar(max) for precision bigger than 4000

The mediumtext datatype does not exist on SQL Server and ntext datatype is deprecated, but should be used if SQL Server is version 2005 or older.

[beppler]

I've created a project fork at https://github.com/mpsinfo/sharpdata that contains this update.

[beppler]

Resolved by #19.