cloud-fan commented on a change in pull request #35271:
URL: https://github.com/apache/spark/pull/35271#discussion_r791324763
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/v2/jdbc/JDBCTableCatalog.scala
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@@ -282,12 +282,12 @@ class JDBCTableCatalog extends TableCatalog with
SupportsNamespaces with Logging
namespace: Array[String],
cascade: Boolean): Boolean = namespace match {
case Array(db) if namespaceExists(namespace) =>
- if (listTables(Array(db)).nonEmpty) {
+ if (!cascade && listTables(Array(db)).nonEmpty) {
Review comment:
`listTables` could be expensive. Can we try-catch the exception thrown
by JDBC and detect the case when the schema/database is not empty?
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