DOKK / manpages / debian 11 / libmongoc-doc / mongoc_database_get_collection_names_with_opts.3.en
MONGOC_DATABASE_GET_COLLECTION_NAMES_WITH_OPTS(3) libmongoc MONGOC_DATABASE_GET_COLLECTION_NAMES_WITH_OPTS(3)

mongoc_database_get_collection_names_with_opts - mongoc_database_get_collection_names_with_opts()

char **
mongoc_database_get_collection_names_with_opts (mongoc_database_t *database,


                                                const bson_t *opts,


                                                bson_error_t *error);


Fetches a NULL terminated array of NULL-byte terminated char* strings containing the names of all of the collections in database.

This function is considered a retryable read operation. Upon a transient error (a network error, errors due to replica set failover, etc.) the operation is safely retried once. If retryreads is false in the URI (see mongoc_uri_t) the retry behavior does not apply.

  • database: A mongoc_database_t.
  • opts: A bson_t containing additional options.
  • error: An optional location for a bson_error_t or NULL.

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

  • sessionId: First, construct a mongoc_client_session_t with mongoc_client_start_session. You can begin a transaction with mongoc_client_session_start_transaction, optionally with a mongoc_transaction_opt_t that overrides the options inherited from database, and use mongoc_client_session_append to add the session to opts. See the example code for mongoc_client_session_t.
  • serverId: To target a specific server, include an int32 "serverId" field. Obtain the id by calling mongoc_client_select_server, then mongoc_server_description_id on its return value.

For a list of all options, see the MongoDB Manual entry on the listCollections command.

Errors are propagated via the error parameter.

A NULL terminated array of NULL terminated char* strings that should be freed with bson_strfreev(). Upon failure, NULL is returned and error is set.

{


   bson_t opts = BSON_INITIALIZER;


   mongoc_read_concern_t *rc;


   bson_error_t error;


   char **strv;


   unsigned i;


   rc = mongoc_read_concern_new ();


   mongoc_read_concern_set_level (rc, MONGOC_READ_CONCERN_LEVEL_MAJORITY);


   mongoc_read_concern_append (rc, &opts);


   if ((strv = mongoc_database_get_collection_names_with_opts (


          database, &opts, &error))) {


      for (i = 0; strv[i]; i++)


         printf ("%s\n", strv[i]);


      bson_strfreev (strv);


   } else {


      fprintf (stderr, "Command failed: %s\n", error.message);


   }


   mongoc_read_concern_destroy (rc);


   bson_destroy (&opts);
}


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June 4, 2021 1.17.6