mongoc_collection_drop_with_opts (mongoc_collection_t *collection,
                                  bson_t *opts,
                                  bson_error_t *error);


opts may be NULL or a BSON document with additional command options:


This function requests that a collection be dropped, including all indexes associated with the collection.

If no write concern is provided in opts, the collection’s write concern is used.

If the collection does not exist, the server responds with an “ns not found” error. It is safe to ignore this error; set the Error API Version to 2 and ignore server error code 26:

mongoc_client_t *client;
mongoc_collection_t *collection;
bson_error_t error;
bool r;

client = mongoc_client_new (NULL);
mongoc_client_set_error_api (client, 2);
collection = mongoc_client_get_collection (client, "db", "collection");
r = mongoc_collection_drop_with_opts (collection, NULL /* opts */, &error);
if (r) {
   printf ("Dropped.\n");
} else {
   printf ("Error message: %s\n", error.message);
   if (error.domain == MONGOC_ERROR_SERVER && error.code == 26) {
      printf ("Ignoring 'ns not found' error\n");
   } else {
      fprintf (stderr, "Unrecognized error!\n");

mongoc_collection_destroy (collection);
mongoc_client_destroy (client);

In MongoDB 3.0 and older, the “ns not found” error code is the generic MONGOC_ERROR_QUERY_FAILURE; in this case check whether the error message is equal to the string “ns not found”.


Errors are propagated via the error parameter.


Returns true if the collection was successfully dropped. Returns false and sets error if there are invalid arguments or a server or network error.