When the data type is a CLOB or BLOB, the Table of the lob and Lob field fields are managed by the supervisor. These fields describe in which table and column the rich media element is stored.
Based on the table used, the Key grid will be filled so that the join can be performed by giving the value of the key.
If the data type is not managed by the supervisor, a program will manage the join and no information can be entered in these two fields.