How to store a lengthy Topic Comments(more than 4000 characters)?

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While trying to store a lengthy Topic Comments(more than 4000 characters) in my customized tableFor Ex: Table Name : TechFeasibilty Column Data Type Comments LONG USERID NUMBER(10)UPDATE TechFeasilibilty set Comments = I am getting the Error Message : ORA-01704: string literal too longBut the same functionality implemented in livelink storing the comments in Extended Data as an Assoc while creating the Topic using llnode.NodeCreate(DAPI.CreateNode).I am not able to trace the livelink code where the insertion of the Extended Data into the Database(DTree) taking place.Please let me know how livelink inserting the extended value into DTree(execution of the SQL Statement).