Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/18148#discussion_r119968406
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/catalog/SessionCatalog.scala
---
@@ -125,14 +126,36 @@ class SessionCatalog(
if (conf.caseSensitiveAnalysis) name else name.toLowerCase(Locale.ROOT)
}
- /**
- * A cache of qualified table names to table relation plans.
- */
- val tableRelationCache: Cache[QualifiedTableName, LogicalPlan] = {
+ private val tableRelationCache: Cache[QualifiedTableName, LogicalPlan] =
{
val cacheSize = conf.tableRelationCacheSize
CacheBuilder.newBuilder().maximumSize(cacheSize).build[QualifiedTableName,
LogicalPlan]()
}
+ /** This method provides a way to get a cached plan. */
+ def getCachedPlan(t: QualifiedTableName, c: Callable[LogicalPlan]):
LogicalPlan = {
+ tableRelationCache.get(t, c)
+ }
+
+ /** This method provides a way to get a cached plan if the key exists. */
+ def getCachedTableIfPresent(key: QualifiedTableName): LogicalPlan = {
+ tableRelationCache.getIfPresent(key)
+ }
+
+ /** This method provides a way to cache a plan. */
+ def putTableInCache(t: QualifiedTableName, l: LogicalPlan): Unit = {
--- End diff --
`cacheTable`
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