Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/13370#discussion_r65125156
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/Column.scala ---
@@ -132,6 +130,15 @@ class Column(protected[sql] val expr: Expression)
extends Logging {
case _ => UnresolvedAttribute.quotedString(name)
})
+ override def toString: String = usePrettyExpression(expr).sql
+
+ override def equals(that: Any): Boolean = that match {
+ case that: Column => that.expr.equals(this.expr)
--- End diff --
oh sorry you just move them up, it's fine to keep them same as before.
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