zhengruifeng commented on code in PR #38395:
URL: https://github.com/apache/spark/pull/38395#discussion_r1006804374
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicLogicalOperators.scala:
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@@ -2100,3 +2100,53 @@ object AsOfJoin {
}
}
}
+
+
+/**
+ * A logical plan for summary.
+ */
+case class Summary(
Review Comment:
since `df.summary` had been reimplemented with dataframe operations
https://github.com/apache/spark/commit/6a0713a141fa98d83029d8388508cbbc40fd554e,
I guess the only difference is that:
with a new plan, the analysis can be saved before the job execution; but if
there is something wrong in analysis, the exception will not be thrown.
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