How to use the ColumnDescriptor's type as CLOB?

Question

I want to build a metric which are used to record the content of a file. But the length of the content is too long, it may not be stored with a ColumnDescriptor's type STRING. I tried to make the TYPE='CLOB', but failed. I though it might be something wrong with my output, but I have no idear how to make it right. Does it supposed to point to a file? Could anyone tell me how to do it?
Here is my code:
metadata.xml
<Metric NAME="TEST_LOB" TYPE="RAW" HELP="NO_HELP">
<TableDescriptor TABLE_NAME="TEST_LOB">
<ColumnDescriptor NAME="TIMES" COLUMN_NAME="TIMES" TYPE="STRING" IS_DATE="TRUE"/>
<ColumnDescriptor NAME="CONTENT" COLUMN_NAME="CONTENT" TYPE="CLOB" />
</TableDescriptor>
<QueryDescriptor FETCHLET_ID="OSLineToken">
<Property NAME="command" SCOPE="GLOBAL">"%perlBin%/perl" "%scriptsDir%/emx/%TYPE%/testlob.pl"</Property>
<Property NAME="delimiter" SCOPE="GLOBAL">%mydelimiter%</Property>
<Property NAME="startsWith" SCOPE="GLOBAL">em_result=</Property>
<Property NAME="errStartsWith" SCOPE="GLOBAL">em_error=</Property>
</QueryDescriptor>
</Metric>collection.xml
<CollectionItem NAME="TEST_LOB">
<Schedule>
<IntervalSchedule INTERVAL="5" TIME_UNIT="Min" />
</Schedule>
<MetricColl NAME="TEST_LOB" />
</CollectionItem>The output of script testlob.pl looks like as below. It started with "em_result=", and delimited by "|".
em_result=2009-07-30 15:30:35|*** (1) TRANSACTION:
TRANSACTION 2 1235033361, ACTIVE 0 sec, process no 14811, OS thread id 1158457696 inserting
mysql tables in use 1, locked 1
LOCK WAIT 3 lock struct(s), heap size 368, undo log entries 4
MySQL thread id 26693314, query id 5239203160 192.168.95.138 passportuser update
insert into digital_id_info (digital_id) values (0x3930303636363734)
*** (1) WAITING FOR THIS LOCK TO BE GRANTED:
RECORD LOCKS space id 45 page no 14 n bits 392 index `idx_unq_digitalid` of table `passport/digital_id_info` trx id 2 1235033361 lock mode S waiting
Record lock, heap no 5 PHYSICAL RECORD: n_fields 2; compact format; info bits 0
0: len 8; hex 3930303636363734; asc 90066674;; 1: len 4; hex 0014dae7; asc ;;
*** (2) TRANSACTION:
TRANSACTION 2 1235033200, ACTIVE 0 sec, process no 14811, OS thread id 1215965536 setting auto-inc lock
mysql tables in use 1, locked 1
3 lock struct(s), heap size 6752, undo log entries 323
MySQL thread id 26693430, query id 5239203161 10.10.71.74 passportuser update
insert into digital_id_info (digital_id) values (0x3930303637343639)
*** (2) HOLDS THE LOCK(S):
RECORD LOCKS space id 45 page no 14 n bits 392 index `idx_unq_digitalid` of table `passport/digital_id_info` trx id 2 1235033200 lock_mode X locks rec but not gap
Record lock, heap no 5 PHYSICAL RECORD: n_fields 2; compact format; info bits 0
0: len 8; hex 3930303636363734; asc 90066674;; 1: len 4; hex 0014dae7; asc ;;
*** (2) WAITING FOR THIS LOCK TO BE GRANTED:
TABLE LOCK table `passport/digital_id_info` trx id 2 1235033200 lock mode AUTO-INC waiting
*** WE ROLL BACK TRANSACTION (1)the scripts for creating table "TEST_LOB",
CREATE TABLE TEST_LOB
TIMES DATE,
CONTENT CLOB
);Any help will be appreciated!!!
Thanks,
Satine

Answer 1

Sorry, that doesn't solve my problem. Please read the question more closely - I want my USERS to be able to do this without changing their configurations. My users are public school elementary teachers and parents. I can't ask them to toggle any settings - I'm looking for a way that my users can do this on their own.
Thanks