#include <db_cxx.h>
 
int
Db::set_ext_file_dir(const char *dir);  

The Db::set_ext_file_dir() method sets the directory where external file data is stored. Use this method if the database is not opened within an encompassing environment. If an environment is in use, use DbEnv::set_ext_file_dir() instead.

By default, if this method is not called then external file data is placed in a directory local to the current working directory.

Use Db::get_ext_file_dir() to identify the current storage location used for external file data.

This method configures operations performed using the specified Db handle, not all operations performed on the underlying database.

This method may not be called after Db::open() is called.

Unless otherwise specified, the Db::set_ext_file_dir() 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.