cloud-fan commented on a change in pull request #24442: [SPARK-27547][SQL] Fix
DataFrame self-join problems
URL: https://github.com/apache/spark/pull/24442#discussion_r281640977
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File path: sql/core/src/main/scala/org/apache/spark/sql/Column.scala
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@@ -144,11 +144,11 @@ class Column(val expr: Expression) extends Logging {
override def toString: String = toPrettySQL(expr)
override def equals(that: Any): Boolean = that match {
- case that: Column => that.expr.equals(this.expr)
+ case that: Column => that.expr.semanticEquals(this.expr)
Review comment:
I made a new change to avoid this issue completely.
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