Convert left correlated join to inner join during transformation #19922
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It's possible to simplify outer join to inner join when subquery side is at least scalar. This makes sure dynamic filters are propagated to left join side and more efficient (cross join) implementaiton is used.
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findepi
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Nov 27, 2023
...n/src/main/java/io/trino/sql/planner/iterative/rule/TransformUncorrelatedSubqueryToJoin.java
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It's possible to simplify outer join to inner
join when subquery side is at least scalar.
This makes sure dynamic filters are propagated
to left join side and more efficient (cross join)
implementaiton is used.