DB_TXN *txnid, u_int32_t *countp, u_int32_t flags);
The DB->truncate interface empties the database, discarding all
records it contains.
The number of records discarded from the database is returned in
If the operation is to be transaction-protected (other than by specifying
the DB_AUTO_COMMIT flag), the txnid parameter is a
transaction handle returned from DB_ENV->txn_begin; otherwise, NULL.
The flags value must be set to 0 or
the following value:
- Enclose the DB->truncate call within a transaction. If the call succeeds,
changes made by the operation will be recoverable. If the call fails,
the operation will have made no changes.
The DB->truncate method returns a non-zero error value on failure and 0 on success.
The DB->truncate method may fail and return a non-zero error for the following conditions:
- The operation was selected to resolve a deadlock.
The DB->truncate method may fail and return a non-zero error for errors specified for other Berkeley DB and C library or system functions.
If a catastrophic error has occurred, the DB->truncate method may fail and
in which case all subsequent Berkeley DB calls will fail in the same way.
Databases and Related Methods
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