Berkeley DB: DB_TXN->discard
Description: Berkeley DB: An embedded database programmatic toolkit.
Keywords: embedded,database,programmatic,toolkit,b+tree,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,Java,C,C++

### DB_TXN->discard |

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###

    #include <db.h>

    int
    DB_TXN->discard(DB_TXN *tid, u_int32_t flags);

### Description: DB_TXN->discard

The DB_TXN->discard method frees up all the per-process resources associated with the specified DB_TXN handle, neither committing nor aborting the transaction. This call may be used only after calls to DB_ENV->txn_recover when there are multiple global transaction managers recovering transactions in a single Berkeley DB environment. Any transactions returned by DB_ENV->txn_recover that are not handled by the current global transaction manager should be discarded using DB_TXN->discard.

The DB_TXN->discard method returns a non-zero error value on failure and 0 on success.

After DB_TXN->discard has been called, regardless of its return, the DB_TXN handle may not be accessed again.

### Parameters

flags
  The flags parameter is currently unused, and must be set to 0.

### Errors

The DB_TXN->discard method may fail and return one of the following non-zero errors:

EINVAL
  If the transaction handle does not refer to a transaction that was recovered into a prepared but not yet completed state; or if an invalid flag value or parameter was specified.

### Class

DB_ENV, DB_TXN

### See Also

Transaction Subsystem and Related Methods`

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