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  1. Core Server
  2. SERVER-61385

Migrate most callers of legacy 'DBClientBase::query()' API to modern 'find()' API

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Details

    • Improvement
    • Status: Closed
    • Major - P3
    • Resolution: Fixed
    • None
    • 5.3.0
    • Internal Client
    • None
    • Fully Compatible
    • QE 2021-11-29, QE 2021-12-13, QE 2021-12-27
    • 64

    Description

      Related ticket SERVER-59512 recently introduced a new API to DBClientBase for performing find operations. This API accepts a FindCommandRequest, in contrast to the legacy DBClientBase::query() overloads. The legacy DBClientBase::query() API requires the caller to specify the find operation as though it were an OP_QUERY find. This is undesirable because the system no longer supports OP_QUERY find. Therefore, the internal client code is required to upconvert the OP_QUERY find description into an OP_MSG find command before actually sending it over the wire.

      The goal of this ticket is to move callers of the legacy DBClientBase::query() API onto the new DBClientBase::find() API. Once this migration is complete, the code which implements DBClientBase::query(), including the special upconversion logic mentioned above, should be deleted. This may need to be done in multiple steps, depending on the complexity and the scope of the code changes.

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              david.storch@mongodb.com David Storch
              david.storch@mongodb.com David Storch
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