This is a reminder of the task to update to Calcite 1.26 (when available): - Checkout https://calcite.apache.org/news/releases/ regarding Calcite 1.25 and 1.26 - See https://github.com/apache/calcite/pull/2107 regarding "Enumerable Merge Join" - Double check that no deprecated rule is in use (https://github.com/diennea/herddb/pull/666) CC: @eolivelli @amitvc