The long nvarchar data type has the same characteristics as the nvarchar data type, but can accommodate strings up to 2 GB in length. Do not declare a length for long nvarchar columns. In embedded SQL data handlers can be created, which are routines to read and write the data for long nvarchar (and long byte) columns. For details about data handlers, see Data Handlers for Large Objects in the “Embedded SQL” chapter, and the Embedded SQL Companion Guide.