DBcursor->c_del(DBC *cursor, u_int32_t flags);
The DBcursor->c_del method deletes the key/data pair to which the cursor
When called on a cursor opened on a database that has been made into a
secondary index using the DB->associate method, the DB->del method
deletes the key/data pair from the primary database and all secondary
The flags parameter is currently unused, and must be set to 0.
The cursor position is unchanged after a delete, and subsequent calls to
cursor functions expecting the cursor to refer to an existing key will
If the element has already been deleted, the DBcursor->c_del method will return DB_KEYEMPTY.
If the cursor is not yet initialized, the DBcursor->c_del method will return EINVAL.
Otherwise, the DBcursor->c_del method returns a non-zero error value on failure and 0 on success.
The DBcursor->c_del method may fail and return a non-zero error for the following conditions:
- The operation was selected to resolve a deadlock.
- A secondary index references a nonexistent primary key.
- An attempt was made to modify a read-only database.
- An invalid flag value or parameter was specified.
- Write attempted on read-only cursor when the DB_INIT_CDB flag was
specified to DB_ENV->open.
The DBcursor->c_del 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 DBcursor->c_del method may fail and
in which case all subsequent Berkeley DB calls will fail in the same way.
Database Cursors and Related Methods
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