Berkeley DB: Dbc::dup
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++

### Dbc::dup |

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###

    #include <db_cxx.h>

    int
    Dbc::dup(Dbc **cursorp, u_int32_t flags);

### Description: Dbc::dup

The Dbc::dup method creates a new cursor that uses the same transaction and locker ID as the original cursor. This is useful when an application is using locking and requires two or more cursors in the same thread of control.

The Dbc::dup method either returns a non-zero error value or throws an exception that encapsulates a non-zero error value on failure, and returns 0 on success.

### Parameters

flags
  The flags parameter must be set to 0 or by bitwise inclusively OR'ing together one or more of the following values:

  DB_POSITION
    The newly created cursor is initialized to refer to the same position in the database as the original cursor and hold the same locks. If the DB_POSITION flag is not specified, then the created cursor is uninitialized and will behave like a cursor newly created using Db::cursor.

### Errors

The Dbc::dup method may fail and throw DbException, encapsulating one of the following non-zero errors, or return one of the following non-zero errors:

DB_REP_HANDLE_DEAD
  The database handle has been invalidated because a replication election unrolled a committed transaction.

EINVAL
  If the cursor has not been initialized; or if an invalid flag value or parameter was specified.

### Class

Dbc

### See Also

Database Cursors and Related Methods`

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