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Published 20 hours ago • verified publisher icon apache

[CALCITE-3508] Strengthen outer Join to inner if it is under a Filter that discards null values

Open sdreynolds opened this issue 5 years ago • 0 comments

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.

sdreynolds avatar Nov 15 '19 21:11 sdreynolds