NAME

       mongoc_read_concern_t - mongoc_read_concern_t

       Read Concern abstraction

SYNOPSIS

       New in MongoDB 3.2.

       The  mongoc_read_concern_t  allows  clients  to choose a level of isolation for their reads. The default,
       MONGOC_READ_CONCERN_LEVEL_LOCAL, is right for the great majority of applications.

       You can specify a read concern on connection objects, database objects, or collection objects.

       See readConcern on the MongoDB website for more information.

       Read Concern is only sent to MongoDB when it has explicitly been set by mongoc_read_concern_set_level  to
       anything other than NULL.

READ CONCERN LEVELS

           ┌────────────────────────────────────────┬─────────────────────────────┬───────────────────────┐
           │ Macro                                  │ Description                 │ First MongoDB version │
           ├────────────────────────────────────────┼─────────────────────────────┼───────────────────────┤
           │ MONGOC_READ_CONCERN_LEVEL_LOCAL        │ Level "local", the default. │ 3.2                   │
           ├────────────────────────────────────────┼─────────────────────────────┼───────────────────────┤
           │ MONGOC_READ_CONCERN_LEVEL_MAJORITY     │ Level "majority".           │ 3.2                   │
           ├────────────────────────────────────────┼─────────────────────────────┼───────────────────────┤
           │ MONGOC_READ_CONCERN_LEVEL_LINEARIZABLE │ Level "linearizable".       │ 3.4                   │
           ├────────────────────────────────────────┼─────────────────────────────┼───────────────────────┤
           │ MONGOC_READ_CONCERN_LEVEL_AVAILABLE    │ Level "available".          │ 3.6                   │
           ├────────────────────────────────────────┼─────────────────────────────┼───────────────────────┤
           │ MONGOC_READ_CONCERN_LEVEL_SNAPSHOT     │ Level "snapshot".           │ 4.0                   │
           └────────────────────────────────────────┴─────────────────────────────┴───────────────────────┘

       For  the  sake of compatibility with future versions of MongoDB, mongoc_read_concern_set_level allows any
       string, not just this list of known read concern levels.

       See Read Concern Levels in the MongoDB manual for more information  about  the  individual  read  concern
       levels.

AUTHOR

       MongoDB, Inc

COPYRIGHT

       2017-present, MongoDB, Inc

1.21.0                                            Feb 09, 2022                          MONGOC_READ_CONCERN_T(3)