Github user ueshin commented on a diff in the pull request:

    https://github.com/apache/spark/pull/13638#discussion_r66880127
  
    --- Diff: 
sql/core/src/main/scala/org/apache/spark/sql/execution/CacheManager.scala ---
    @@ -155,8 +156,9 @@ private[sql] class CacheManager extends Logging {
        * function will over invalidate.
        */
       private[sql] def invalidateCache(plan: LogicalPlan): Unit = writeLock {
    +    val canonicalized = plan.canonicalized
         cachedData.foreach {
    -      case data if data.plan.collect { case p if p.sameResult(plan) => p 
}.nonEmpty =>
    +      case data if data.plan.collect { case p if 
p.sameResult(canonicalized) => p }.nonEmpty =>
    --- End diff --
    
    I don't think so.
    For example, if the cached plan is `LocalRelation` (which is canonicalized) 
and the `plan` argument is `SubqueryAlias(LocalRelation)` (which is not 
canonicalized), it will fail to find the same-result plan.


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