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mongoc_client_command_simple(3)

MONGOC_CLIENT_COMMAND_SIMPLE(3) libmongoc MONGOC_CLIENT_COMMAND_SIMPLE(3)

SYNOPSIS

bool
mongoc_client_command_simple (mongoc_client_t *client,


                              const char *db_name,


                              const bson_t *command,


                              const mongoc_read_prefs_t *read_prefs,


                              bson_t *reply,


                              bson_error_t *error);


This is a simplified interface to mongoc_client_command() <>. It returns the first document from the result cursor into reply. The client's read preference, read concern, and write concern are not applied to the command.

Warning:

reply is always set, and should be released with bson_destroy() <https://www.mongoc.org/libbson/current/bson_destroy.html>.


This function is not considered a retryable read operation.

PARAMETERS

  • client: A mongoc_client_t <>.
  • db_name: The name of the database to run the command on.
  • command: A bson_t <https://www.mongoc.org/libbson/current/bson_t.html> containing the command specification.
  • read_prefs: An optional mongoc_read_prefs_t <>. Otherwise, the command uses mode MONGOC_READ_PRIMARY.
  • reply: A maybe-NULL pointer to overwritable storage <https://www.mongodb.com/docs/languages/c/c-driver/current/libbson/guides/lifetimes/#overwritable-storage> for a bson_t <https://www.mongoc.org/libbson/current/bson_t.html> to contain the results.
  • error: An optional location for a bson_error_t <> or NULL.

ERRORS

Errors are propagated via the error parameter.

RETURNS

Returns true if successful. Returns false and sets error if there are invalid arguments or a server or network error.

This function does not check the server response for a write concern error or write concern timeout.

Author

MongoDB, Inc

Copyright

2009-present, MongoDB, Inc.

February 10, 2026 1.30.7