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[CALCITE-1956] Allow MultiJoin to chain multiple FULL joins

Open laurentgo opened this issue 6 years ago • 2 comments

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

laurentgo avatar May 24 '19 22:05 laurentgo

Copy of #523, since the original pull request seems to be stalled. @minji-kim @michaelmior let me know if you're okay with this.

laurentgo avatar May 24 '19 22:05 laurentgo

Hey @laurentgo what do you mean by copy? I've seen that @jcamachor had some blocking comments in the old PR. Are they resolved?

zabetak avatar Jul 26 '19 07:07 zabetak