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Posted to commits@calcite.apache.org by GitBox <gi...@apache.org> on 2019/11/15 21:22:03 UTC

[GitHub] [calcite] sdreynolds opened a new pull request #1589: [CALCITE-3508] Strengthen Outer Joins based on FILTER clauses

sdreynolds opened a new pull request #1589: [CALCITE-3508] Strengthen Outer Joins based on FILTER clauses
URL: https://github.com/apache/calcite/pull/1589
 
 
   This change expands upon `FilterJoinRule` ability to strengthen JOINs
   by leveraging the filter clauses within the query. For a JOIN that is
   nullable on either the left or the right, this change inspects the
   Filter clauses of the query to determine if it is possible to
   strengthen the JOIN.

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