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MONGOC_CLIENT_GET_DATABASE_NAMES_WITH_OPTS(3) libmongoc MONGOC_CLIENT_GET_DATABASE_NAMES_WITH_OPTS(3)

SYNOPSIS

char **
mongoc_client_get_database_names_with_opts (mongoc_client_t *client,


                                            const bson_t *opts,


                                            bson_error_t *error);


This function queries the MongoDB server for a list of known databases.

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.

PARAMETERS


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 client, 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 listDatabases command <https://www.mongodb.com/docs/manual/reference/command/listDatabases/>.

ERRORS

Errors are propagated via the error parameter.

RETURNS

A NULL terminated vector of NULL-byte terminated strings. The result should be freed with bson_strfreev() <https://www.mongoc.org/libbson/current/bson_strfreev.html>.

NULL is returned upon failure and error is set.

EXAMPLES

{


   bson_error_t error;


   char **strv;


   unsigned i;


   if ((strv = mongoc_client_get_database_names_with_opts (client, NULL, &error))) {


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


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


      bson_strfreev (strv);


   } else {


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


   }
}


Author

MongoDB, Inc

Copyright

2009-present, MongoDB, Inc.

December 11, 2025 2.2.1