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

DBcursor->dup |

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    #include <db.h>

    int
    DBcursor->dup(DBC *DBcursor, DBC **cursorp, u_int32_t flags);

Description: DBcursor->dup

The DBcursor->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 DBcursor->dup method returns a non-zero error value on failure and 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 (if any) and hold the same locks (if any). If the DB_POSITION flag is not specified, or the original cursor does not hold a database position and locks, the created cursor is uninitialized and will behave like a cursor newly created using DB->cursor.

Errors

The DBcursor->dup method may fail and 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.

DB_REP_LOCKOUT

- The operation was blocked by client/master synchronization.

EINVAL

- An invalid flag value or parameter was specified.

Class DBC
See Also Database Cursors and Related Methods`

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