Field help (APROLCK)

Lock, type of external lock (user or system), Description.

The external locks of the type user are obtained by the user applications. All processes that are blocked by others are likely to have one of these locks.

The external locks of the type user are as follows :

• TM : place in the pending queue DML.
• TX : placed in the pending queue of transactions.
• UL : supplied by the user.
   

Other types of lock exist. The complete type and the description of the code.