mongoc_error_has_label(3)

MONGOC_ERROR_HAS_LABEL(3) libmongoc MONGOC_ERROR_HAS_LABEL(3)

SYNOPSIS

bool
mongoc_error_has_label (const bson_t *reply, const char *label);


Test whether a reply from a failed operation includes a specific error label. See Error Labels <#error-labels> for details, and see mongoc_client_session_start_transaction() <> for example code that demonstrates their use.

PARAMETERS

  • reply: A non-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.
  • label: The label to test for, such as "TransientTransactionError" or "UnknownTransactionCommitResult".

RETURNS

Returns true if reply contains the error label.

Author

MongoDB, Inc

Copyright

2009-present, MongoDB, Inc.

February 10, 2026 1.30.7