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  1. Core Server
  2. SERVER-38539

Remove $_internalLatestOplogTimestamp and mergeByPBRT from change streams in 4.4

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    • Icon: Task Task
    • Resolution: Fixed
    • Icon: Major - P3 Major - P3
    • 4.3.1
    • None
    • Aggregation Framework
    • None
    • Fully Compatible
    • Query 2019-07-01

    Description

      In 4.2, we added a new postBatchResumeToken to each batch returned by a change stream, which superseded the older $_internalLatestOplogTimestamp mechanism used when merging the streams on mongoS. However, we had to retain the latter in 4.2 to facilitate upgrade from and downgrade to 4.0.

      Now that it is no longer necessary, we should remove all remaining traces of $_internalLatestOplogTimestamp from the codebase.

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            bernard.gorman@mongodb.com Bernard Gorman
            bernard.gorman@mongodb.com Bernard Gorman
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