Upload a pdf file in the jasper server repository using jasper etl

Update JICONTENTRESOURCE

set

 data = bytea_import('C:\Users\avinashpo\Desktop\DM\testset\Avinash.pdf')where id =20667;

I am using this query in jasperETL to upload a specific file. but jasper doesnt allow absolute path in query. is there any way to achieve this. Thoughts/ trails/soultions appreciated. Thanks in advance!!