Github user viirya commented on the issue:
https://github.com/apache/spark/pull/18968
@cloud-fan Are they the same issue? I think you propose to simplify the
data type checking? This PR goes to avoid reporting unresolved plans.
In this query:
SELECT t1.a FROM t1
WHERE
t1.a IN (SELECT t2.c
FROM t2
WHERE t1.b < t2.d);
The left side of `In` is `t1.a`. After pulling correlated predicates, the
right side is `(t2.c, t2.d)`. They don't match but we shouldn't fail the check
and report it unresolved plan.
Am I thinking it incorrectly? Or I misunderstand you propose?
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