cloud-fan commented on code in PR #41777:
URL: https://github.com/apache/spark/pull/41777#discussion_r1245908061
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sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala:
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@@ -4292,6 +4292,14 @@ object SQLConf {
.checkValue(_ >= 0, "The threshold of cached local relations must not be
negative")
.createWithDefault(64 * 1024 * 1024)
+ val QUERY_RESULT_CACHE_AUTO_REFRESH =
buildConf("spark.sql.queryResultCache.autoRefresh.enabled")
+ .doc("When true, refresh the query result cache automatically if any of
the tables " +
+ "referenced by the query gets updated. Note that, auto refresh won't be
triggered if the " +
+ "table updates happen outside of this Spark application.")
Review Comment:
Yes, the key is that this Spark application (spark driver) needs to be aware
of table updates, which is not possible if it happens in other systems or other
Spark applications.
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