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  1. Python Driver
  2. PYTHON-796

Support cursor in listCollections and listIndexes commands

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    Details

    • Type: Improvement
    • Status: Closed
    • Priority: Minor - P4
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 2.8, 3.0
    • Component/s: None
    • Labels:
      None
    • Backwards Compatibility:
      Fully Compatible
    • Sprint:
      Python Sprint 12

      Description

      Starting with MongoDB 2.8, Database.collection_names gets its results by calling the listCollections command rather than querying the system.namespaces collection directly. This causes a regression in that the number of collection names returned is limited by the size of a single result document (currently 16MB). The listCollections command will be changed to return a cursor document. Database.collection_names will iterate that cursor to build the list it returns.

      A similar issue exists with Collection.index_information, which was changed to use the listIndexes command. The listIndexes command will also be changed to return a cursor document. Collection.index_information will iterate that cursor to build the dict it returns.

      This is not a backward breaking change since Database.collection_names and Collection.index_information will continue to return the types they currently return.

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                • Created:
                  Updated:
                  Resolved: