Data type for SQL Server for DbType.AnsiString

[beppler]

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

• char(255) if precision is not specified
• char(n) if precision is between 1 and 255
• text if precision is between 256 and 65535
• mediumtext if precision is between 65536 and 16777215

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

• varchar(255) if precision is not specified (to remain compatible with previous behavior)
• varchar(n) for precision between 1 and 8000
• varchar(max) for precision bigger than 8000

The mediumtext datatype does not exist on SQL Server and text 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.