BLOB

[Guhr, Hagen]

Hi,
 
im searching for a way to find out if a database-blob exsist. There are 
column entries like this one in my table: Name: "L_DATA_4"           
Datatype: Long BYTE.
 
Now I try to find out if there is some data in this column without 
reading the whole blob. Is there a way to create a SQL-Statement with a 
WHERE-Clause like: where L_DATA_4 > 0 ?
 

Thanks