amaliujia commented on code in PR #36969:
URL: https://github.com/apache/spark/pull/36969#discussion_r905486093
##########
sql/core/src/test/scala/org/apache/spark/sql/internal/CatalogSuite.scala:
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@@ -743,4 +743,35 @@ class CatalogSuite extends SharedSparkSession with
AnalysisTest with BeforeAndAf
val catalogName2 = "catalog_not_exists"
assert(!spark.catalog.databaseExists(Array(catalogName2,
dbName).mkString(".")))
}
+
+ test("three layer namespace compatibility - current database") {
Review Comment:
and catalog manager has a `currentNamespace`:
https://github.com/apache/spark/blob/a3fdf3b107b62089890a4246c168ca516dff5d44/sql/catalyst/src/main/scala/org/apache/spark/sql/connector/catalog/CatalogManager.scala#L92.
So for changing `currentDatabase`, it could be as easy as calling the
catalog manager `currentNamespace`
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