Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/14132#discussion_r71041330
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
---
@@ -1774,6 +1775,35 @@ class Analyzer(
}
/**
+ * Substitute Hints.
+ * - BROADCAST/BROADCASTJOIN/MAPJOIN match the closest table with the
given name parameters.
--- End diff --
`Substitution` can be executed before resolution or after resolution. If we
move it after relation resolution, the existing logics is broken.
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