# mongoc_client_get_default_database()

## Synopsis

    mongoc_database_t *
    mongoc_client_get_default_database (mongoc_client_t *client)
       BSON_GNUC_WARN_UNUSED_RESULT;

Get the database named in the MongoDB connection URI, or `NULL` if the URI specifies none.

Useful when you want to choose which database to use based only on the URI in a configuration file.

## Parameters

- `client`: A mongoc_client_t.

## Returns

A newly allocated mongoc_database_t that should be freed with mongoc_database_destroy().

## Example

Default Database Example

    /* default database is "db_name" */
    mongoc_client_t *client = mongoc_client_new ("mongodb://host/db_name");
    mongoc_database_t *db = mongoc_client_get_default_database (client);

    assert (!strcmp ("db_name", mongoc_database_get_name (db)));

    mongoc_database_destroy (db);
    mongoc_client_destroy (client);

    /* no default database */
    client = mongoc_client_new ("mongodb://host/");
    db = mongoc_client_get_default_database (client);

    assert (!db);

    mongoc_client_destroy (client);