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  1. Ignite
  2. IGNITE-14784

Calcite engine. Add sorted set op (EXCEPT, INTERSECT) implementation

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    • Type: Improvement
    • Status: Open
    • Priority: Minor
    • Resolution: Unresolved
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: None

      Description

      Currently, we have hash-map based implementations for EXCEPT and INTERSECT operators (see IgniteIntersect, IgniteMinus, AbstractSetOpNode classes). But, if all inputs are sorted by all columns we can use that fact and implement a sorted set-op algorithm (see sorted aggregates for example).   

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              • Assignee:
                Unassigned
                Reporter:
                alex_pl Aleksey Plekhanov
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                • Created:
                  Updated: