Use sp_drv_image_locator_charindex which accesses the Transact-SQL function charindex.
sp_drv_image_locator_charindex sequence_locator, locator, start, start_position
sequence_locator – an image_locator that points to the byte sequence to search for.
locator – an image_locator that references the image column to search from.
start – an integer specifying the position from which to begin searching. The first position is 1.
start_position – an integer specifying the starting position of the byte sequence in the LOB column referenced by locator.
None.
