1MONGOC_READ_CONCERN_T(3)           libmongoc          MONGOC_READ_CONCERN_T(3)
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5Read Concern abstraction
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SYNOPSIS

8       New in MongoDB 3.2.
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10       The mongoc_read_concern_t allows clients to choose a level of isolation
11       for their reads. The default, MONGOC_READ_CONCERN_LEVEL_LOCAL, is right
12       for the great majority of applications.
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14       You can specify a read concern on connection objects, database objects,
15       or collection objects.
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17       See readConcern on the MongoDB website for more information.
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19       Read Concern is only sent to MongoDB when it has explicitly been set by
20       mongoc_read_concern_set_level() to anything other than NULL.
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READ CONCERN LEVELS

23          ┌────────────────────┬─────────────────────┬─────────────────────┐
24          │Macro               │ Description         │ First  MongoDB ver‐ │
25          │                    │                     │ sion                │
26          ├────────────────────┼─────────────────────┼─────────────────────┤
27          │MONGOC_READ_CON‐    │ Level  "local", the │ 3.2                 │
28          │CERN_LEVEL_LOCAL    │ default.            │                     │
29          ├────────────────────┼─────────────────────┼─────────────────────┤
30          │MONGOC_READ_CON‐    │ Level "majority".   │ 3.2                 │
31          │CERN_LEVEL_MAJORITY │                     │                     │
32          ├────────────────────┼─────────────────────┼─────────────────────┤
33          │MONGOC_READ_CON‐    │ Level    "lineariz‐ │ 3.4                 │
34          │CERN_LEVEL_LIN‐     │ able".              │                     │
35          │EARIZABLE           │                     │                     │
36          ├────────────────────┼─────────────────────┼─────────────────────┤
37          │MONGOC_READ_CON‐    │ Level "available".  │ 3.6                 │
38          │CERN_LEVEL_AVAIL‐   │                     │                     │
39          │ABLE                │                     │                     │
40          ├────────────────────┼─────────────────────┼─────────────────────┤
41          │MONGOC_READ_CON‐    │ Level "snapshot".   │ 4.0                 │
42          │CERN_LEVEL_SNAPSHOT │                     │                     │
43          └────────────────────┴─────────────────────┴─────────────────────┘
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45       For  the  sake  of  compatibility  with  future  versions  of  MongoDB,
46       mongoc_read_concern_set_level() allows any string, not just  this  list
47       of known read concern levels.
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49       See  Read  Concern  Levels  in  the MongoDB manual for more information
50       about the individual read concern levels.
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AUTHOR

53       MongoDB, Inc
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56       2017-present, MongoDB, Inc
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611.25.1                           Nov 08, 2023         MONGOC_READ_CONCERN_T(3)
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