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  1. Ignite
  2. IGNITE-13919

Calcite integration. Single group aggregates

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      Description

      Investigate the optimization for single group aggregates,
      e.g.: SELECT <aggregates> FROM <table>

      Now the hash based aggregates are used for this case.
      We can obtain a little performance improvement.
      Also the special cases (e.g.: SELECT COUNT(<any-columns>) FROM <table>) may be optimized to use table/cache size.

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            • Assignee:
              Unassigned
              Reporter:
              tledkov-gridgain Taras Ledkov

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