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I have a lock handle from dbms_lock.allocate_unique() but I would like to get the Lock ID from the handle. By ID I mean the value of SYS.DBMS_ALLOCATED_LOCK.LOCKID and V$LOCK.ID1. From what I can see, it seems that the Lock Handle comprises the Lock ID concatenated with another number. However, they are both just numbers, so I don't know whether I can rely on a blunt lock ID = substr(lock_handle, 10).

Why I want this. I would like to be able to check for active User Defined locks in V$LOCK without having to look up the LOCKID in DBMS_ALLOCATED_LOCK by NAME (as NAME is not indexed).

I know why Oracle obfuscate the Lock ID behind the Lock Handle, but in this case I can be quite sure that the Lock ID won't be in a collision.

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    What is SYS.DBMS_ALLOCATE_LOCK? Such object does not exist. DBMS_LOCK_ALLOCATED.NAME is indexed.
    – Balazs Papp
    Dec 6, 2022 at 19:29
  • @BalazsPapp I meant DBMS_LOCK_ALLOCATED. I'll check about the index. If you're right about NAME being indexed I will need to change my thinking. I might just need a hint to correct the path.
    – APC
    Dec 6, 2022 at 19:36

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