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  1. Core Server
  2. SERVER-3334

Stop processing bson fields in projection.transform after projections met (esp. _id)

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Details

    • Improvement
    • Status: Backlog
    • Minor - P4
    • Resolution: Unresolved
    • None
    • None
    • Querying
    • None
    • Query Execution

    Description

      Currently the projection code loops through all the fields even if the projections have been satisfied. This leads to more reads (and possible page faults) than are needed to fullfil the projection.

      It would be good to shortcut this esp. for _id when just wanting to return that.

      Attachments

        Issue Links

          related to

          Improvement - An improvement or enhancement to an existing feature or task. SERVER-14050 Exit BSON parsing early on retrieving data.

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

          Improvement - An improvement or enhancement to an existing feature or task. SERVER-5022 full document always loaded for matches if there is a chunk manager

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

          Activity

            People

              backlog-query-execution Backlog - Query Execution
              scotthernandez Scott Hernandez (Inactive)
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              Dates

                Created:
                Updated: