Does multiload work with inequlity conditions of partition primary index

Database

Does multiload work with inequlity conditions of partition primary index

Hi
Does multiload work with inequality conditions , my job is failing giving me error as invalid update statement (3538 ).

I am using partition primary index column SYD_DT in where clause of update statement

Like SYD_DT <=’2008-07-07’ and my job is failing with error 3538

How to rectify the same