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Feature: support the left child of dependent join contains subquery in from clause #6688

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@xudong963

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@xudong963

support the following case:

create table t(a int);
insert into t values(1), (2);
select * from (select a + 1 as a from t) as t where (select sum(a) from t as t1 where t1.a < t.a) = 1;

Originally posted by @leiysky in #6632 (comment)

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A-plannerArea: planner/optimizerC-featureCategory: feature

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