Use sp_drv_unitext_locator_charlength to find the character length of a LOB column referenced by a unitext locator. sp_drv_unitext_locator_charlength accesses the Transact-SQL function char_length.
sp_drv_unitext_locator_charlength locator, data_length
locator – a unitext_locator that references the unitext column to manipulate.
data_length – an integer specifying the character length of the unitext column referenced by locator.
None.