Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/17185#discussion_r206382570
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/LogicalPlan.scala
---
@@ -120,22 +120,54 @@ abstract class LogicalPlan
/**
* Resolve the given `name` string against the given attribute,
returning either 0 or 1 match.
--- End diff --
can you briefly explain the new resolution logic? I feel it's a little
convoluted now as we are more likely to be ambiguous.
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