maryannxue commented on a change in pull request #23687:
[SPARK-26708][SQL][followup] put the special handling of non-cascade uncache in
the uncache method
URL: https://github.com/apache/spark/pull/23687#discussion_r252105791
##########
File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/CacheManager.scala
##########
@@ -160,46 +160,35 @@ class CacheManager extends Logging {
}
// Re-compile dependent cached queries after removing the cached query.
if (!cascade) {
- recacheByCondition(spark, _.find(_.sameResult(plan)).isDefined,
clearCache = false)
+ recacheByCondition(spark, cd => {
+ // If the cache buffer has already been loaded, we don't need to
recompile the cached plan,
+ // as it does not rely on the plan that has been uncached anymore, it
will just produce
+ // data from the cache buffer.
Review comment:
I think it might still be worth keeping the original comment starting from
"Note that ...".
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