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Posted to commits@calcite.apache.org by GitBox <gi...@apache.org> on 2019/05/24 22:01:11 UTC

[GitHub] [calcite] laurentgo opened a new pull request #1235: [CALCITE-1956] Allow MultiJoin to chain multiple FULL joins

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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