SQL Loader: Load empty clob field as null

Question

Howdy,
I am trying to figure a way to load and empty clob from a text file as null rather than empty_clob().
The database is 11.2.0.2.
The file to be loaded was extracted from SQL Server 2008 via bcp.
"my_table" definition;
ID NUMBER
UDF CLOBhere is my control file
load data
CHARACTERSET UTF8
infile '/u01/home/oracle/data_text.dat' "str '%%%%'"
into table  "scott.mytable"
truncate
fields terminated by '||' optionally enclosed by '^^'
trailing nullcols
(ID,
UDF CHAR(8000) NULLIF (UDF="empty_clob()"))I've also tried:
UDF CHAR(8000) NULLIF (UDF=BLANKS))After the table loaded successfully, I queried the table and found teh UDF field was not null, but rather an initialized clob.
SQL>  select dbms_lob.getlength(udf) from mytable;
DBMS_LOB.GETLENGTH(UDF)
                       0
                       0
SQL> select udf from mytable where udf is not null;
UDF
2 rows selected.Thanks.

Answer 1

According to the docs, NULLIF should work - http://docs.oracle.com/cd/E11882_01/server.112/e22490/ldr_loading.htm#sthref1037
Do you get the same results with both the control files ? Have you tried "UDF CHAR(8000) NULLIF UDF=BLANKS )" ?
http://docs.oracle.com/cd/E11882_01/server.112/e22490/ldr_field_list.htm#sthref862
HTH
Srini