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  1. Drivers
  2. DRIVERS-254

Add support for the readConcern option.

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Details

    • New Feature
    • Status: Closed
    • Major - P3
    • Resolution: Done
    • None
    • None
    • None

    Description

      The Read Concern specification details the specifics of implementing read concern in your driver. You'll find that it is very similar to write concern.


      How it looks like for commands:

      db.runCommand({
      		 
          find: ....,
      		 
          readConcern : {
      		 
              level: “[majority|local]”
      		 
          }
      		 
      });

      Note: readConcern is only supported for the new find command helper, not legacy OP_QUERY queries.


      New URI option:

      mongodb://server:27017/db?readConcernLevel=[majority|local]


      The commands that accept read concern are listed below:

      • find
      • aggregate without $out
      • mapReduce when the result is inline
      • distinct
      • count
      • parallelCollectionScan
      • geoNear
      • geoSearch
      You only need to add support for these commands to your helper methods. Users using the runCommand method on your database object will need to supply a readConcern manually.

      Attachments

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          depends on

          New Feature - A new feature of the product, which has yet to be developed. CDRIVER-837 Add support for the readConcern option

          • Major - P3 - Major loss of function.
          • Closed

          New Feature - A new feature of the product, which has yet to be developed. CSHARP-1438 Support ReadConcern

          • Major - P3 - Major loss of function.
          • Closed

          New Feature - A new feature of the product, which has yet to be developed. CXX-694 Support "read committed" isolation level where "committed" means confimed by the voting majority of a replica set

          • Major - P3 - Major loss of function.
          • Closed

          New Feature - A new feature of the product, which has yet to be developed. CXX-695 Support "read committed" isolation level where "committed" means confimed by the voting majority of a replica set

          • Major - P3 - Major loss of function.
          • Closed

          New Feature - A new feature of the product, which has yet to be developed. JAVA-2002 Support ReadConcern

          • Major - P3 - Major loss of function.
          • Closed

          New Feature - A new feature of the product, which has yet to be developed. NODE-541 Support "read committed" isolation level where "committed" means confimed by the voting majority of a replica set

          • Major - P3 - Major loss of function.
          • Closed

          New Feature - A new feature of the product, which has yet to be developed. PHPC-448 Add support for the readConcern option

          • Major - P3 - Major loss of function.
          • Closed

          New Feature - A new feature of the product, which has yet to be developed. PHPLIB-130 Add support for the readConcern option

          • Major - P3 - Major loss of function.
          • Closed

          New Feature - A new feature of the product, which has yet to be developed. PYTHON-981 Support readConcern option

          • Major - P3 - Major loss of function.
          • Closed

          New Feature - A new feature of the product, which has yet to be developed. RUBY-1038 Support ReadConcern

          • Major - P3 - Major loss of function.
          • Closed

          New Feature - A new feature of the product, which has yet to be developed. RUST-12 Add integration tests for readConcern using command monitoring

          • Major - P3 - Major loss of function.
          • Closed
          is depended on by

          Task - A task that needs to be done. SERVER-20214 Stop supporting majority read concern level with MapReduce and Aggregation $out

          • Major - P3 - Major loss of function.
          • Closed
          related to

          Improvement - An improvement or enhancement to an existing feature or task. SERVER-18022 Support "read committed" isolation level where "committed" means confirmed by the voting majority of a replica set

          • Major - P3 - Major loss of function.
          • Closed

          Improvement - An improvement or enhancement to an existing feature or task. DOCS-10647 Document readConcern option for inline mapReduce

          • Minor - P4 - Minor loss of function, or other problem where easy workaround is present.
          • Closed

          Activity

            People

              craig.wilson@mongodb.com Craig Wilson
              barrie Barrie Segal
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              Dates

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                Updated:
                Resolved: