Github user viirya commented on the issue:
https://github.com/apache/spark/pull/16785
@cloud-fan yeah, i agreed with you and @hvanhovell.
For too slow constraint propagation, except for attacking
`getAliasedConstraints` like this change, maybe we can have other way to
improve the process doing constraint propagation.
If we can't, for such long lineages, I think we should use checkpointing to
fix it like #16775.
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