This is what I use, except it's for text data types. I thought that varchar (if that's what your field is set as) is a max lenght of 4000. Anyway, here's my script to output text that is more than 4000 characters.

Declare @ptr varbinary(16),

@length int,

@Search varchar(200)

Set@Search = 'Title: 29aa58348'

--Set@Search = 'Title: 29aa58348'

Select @length = DataLength(FODocument)

From Admin..PrintJob

Where DocumentName = @Search

Select @ptr = TextPtr(FODocument)

From Admin..PrintJob

Where DocumentName = @Search

--Select @Search As [SearchParameter], @length As [LengthOfField], @ptr As [PointLocation]

If @ptr IS NOT NULL

ReadText PrintJob.FODocument @ptr 0 @length