MONGOC_SESSION_OPT_T(3) libmongoc MONGOC_SESSION_OPT_T(3) #include <mongoc/mongoc.h> typedef struct _mongoc_session_opt_t mongoc_session_opt_t; SYNOPSIS Start a session with mongoc_client_start_session(), use the session for a sequence of operations and multi-document transactions, then free it with mongoc_client_session_destroy(). Any mongoc_cursor_t or mongoc_change_stream_t using a session must be destroyed before the ses- sion, and a session must be destroyed before the mongoc_client_t it came from. By default, sessions are causally consistent. To disable causal consis- tency, before starting a session create a mongoc_session_opt_t with mongoc_session_opts_new() and call mongoc_session_opts_set_causal_consistency(), then free the struct with mongoc_session_opts_destroy(). Unacknowledged writes are prohibited with sessions. A mongoc_client_session_t must be used by only one thread at a time. Due to session pooling, mongoc_client_start_session() may return a session that has been idle for some time and is about to be closed after its idle time- out. Use the session within one minute of acquiring it to refresh the ses- sion and avoid a timeout. See the example code for mongoc_session_opts_set_causal_consistency(). AUTHOR MongoDB, Inc COPYRIGHT 2009-present, MongoDB, Inc. 1.30.8 Aug 27, 2026 MONGOC_SESSION_OPT_T(3)
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