Build StreamingGroupNode in extendWithAggPipeline when eligible

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    • Type: Task
    • Resolution: Fixed
    • Priority: Major - P3
    • 9.1.0-rc0, 9.1.0-rc1025
    • Affects Version/s: None
    • Component/s: None
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    • Query Execution
    • Fully Compatible
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      Overview

      SERVER-136171 and SERVER-138459 mark a pushed-down $group as eligibleForStreamingGroup on its GroupNode and count it, but never build a StreamingGroupNode. Build one when it is eligible.

      Scope of Work

      • When featureFlagSbeStreamingGroup is on and the $group is eligible, extendWithAggPipeline builds a StreamingGroupNode instead of a GroupNode, with streamingKey set from the matched sort fields.
      • The eligibility counter stays under its own flag, featureFlagStreamingGroupEligibilityCounter; a streaming node still counts as eligible.
      • Add featureFlagSbeStreamingGroup back to fully_disabled_feature_flags.yml. SlotBasedStageBuilder::buildStreamingGroup only tasserts (13600700) until the stage builder is implemented, so the all-feature-flags variants would fail otherwise.

      Acceptance Criteria

      • Planner tests check the node type with the flag on and off.

            Assignee:
            Evan Bergeron
            Reporter:
            Evan Bergeron
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              Created:
              Updated:
              Resolved: