cloud-fan edited a comment on pull request #28717:
URL: https://github.com/apache/spark/pull/28717#issuecomment-638407200
@brkyvz I tried triple self-join but can't find a buggy case:
```
sql("select * from t t1 join t t2 join t t3 where t1.a = t3.a").show
sql("select * from t t1 join t t2 on t1.b = t2.a join t t3 on t1.a =
t3.a").show
sql("select * from t t1 join t t2 on t1.b = t2.a join t t3 on t2.a =
t3.a").show
```
Please let me know if you see some broken join queries.
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