laurentgo opened a new pull request #1235: [CALCITE-1956] Allow MultiJoin to chain multiple FULL joins URL: https://github.com/apache/calcite/pull/1235 Currently, JoinToMultiJoinRule does not collapse well joins if they are null-generating (e.g. full/left/right). In particular, if all the joins are FULL joins, then it should be able to collapse all the joins into a single MultiJoin and apply LoptOptimizeJoinRule to re-order the join inputs. Change-Id: Ia6f72df9c4dfd0a8317a884dc28835b34011fb4e
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