How to calculate an

Does anyone know how to calculate the "actual size" consumed by an LRAW data type field?

For example: The EDI40 table contains an LRAW field (VARDATA). The length of this field is 3800.

I'm able to use the follwing sql query to calcuate the sum of bytes in a CLOB data type so I naturally assume that something similar is possible for the LRAW or LCHR (INT2) data type fields. ... ?

Select sum(BIGINT(length(xyz.REPCONTENT)))

from xyz.GRACSODREPDATA;