mccheah commented on a change in pull request #23915: SPARK-24252: Add v2
catalog plugin system.
URL: https://github.com/apache/spark/pull/23915#discussion_r261697335
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File path: sql/core/src/main/scala/org/apache/spark/sql/SparkSession.scala
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@@ -620,6 +622,12 @@ class SparkSession private(
*/
@transient lazy val catalog: Catalog = new CatalogImpl(self)
+ @transient private lazy val catalogs = new mutable.HashMap[String,
CatalogPlugin]()
Review comment:
I was thinking JDBC would be a significant one, enough so that it's worth
putting in the API up front and showing that we support it. We'd like to be
able to shut down connection pools when the catalog is discarded.
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