AssHero opened a new pull request, #3621:
URL: https://github.com/apache/arrow-datafusion/pull/3621
# Which issue does this PR close?
Closes #3565
# Rationale for this change
ReduceOuterJoin optimizer support cast or try_cast exprs in predicate.
for query:
select * from t1 left join t2 on t1.t1_id = t2.t2_id where cast(t2.t2_id as
int64) < Int64(100);
which contains cast or try_cast expr in where clause，can also be transformed
to inner join
select * from t1 inner join t2 on t1.t1_id = t2.t2_id where cast(t2.t2_id as
int64) < Int64(100);
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