Clear result cache

Author: bahusoid

src/NHibernate.Test/TestCase.cs

@@ -295,22 +295,6 @@ public static void DropSchema(bool useStdOut, SchemaExport export, ISessionFacto
 		{
 			switch (sfi?.ConnectionProvider.Driver)
 			{
-				// Clear connection pool for Oracle to avoid problem that was manifested with https://github.com/nhibernate/nhibernate-core/pull/1517:
-				// As it seems Oracle can cache returned types for query for given connection.
-				// So exception can be thrown if two tests execute same query but with different types in result (like for Entity.Id int and Entity.Id Guid)
-				case OracleClientDriver oraSysData:
-				case OracleDataClientDriver oraUnmanaged:
-				case OracleManagedDataClientDriver oraManaged:
-					using (var con = sfi.ConnectionProvider.GetConnection())
-					using (var cmd = con.CreateCommand())
-					{
-						cmd.CommandText = "alter system flush shared_pool;";
-						cmd.Connection = con;
-						cmd.ExecuteNonQuery();
-					}
-
-					break;
-
 				// Firebird will pool each connection created during the test and will marked as used any table
 				// referenced by queries. It will at best delays those tables drop until connections are actually
 				// closed, or immediately fail dropping them.
@@ -332,6 +316,25 @@ protected virtual DebugSessionFactory BuildSessionFactory()
 
 		private void Cleanup()
 		{
+			switch (Sfi?.ConnectionProvider.Driver)
+			{
+				// Clear connection pool for Oracle to avoid problem that was manifested with https://github.com/nhibernate/nhibernate-core/pull/1517:
+				// As it seems Oracle can cache returned types for query for given connection.
+				// So exception can be thrown if two tests execute same query but with different types in result (like for Entity.Id int and Entity.Id Guid)
+				case OracleClientDriver oraSysData:
+				case OracleDataClientDriver oraUnmanaged:
+				case OracleManagedDataClientDriver oraManaged:
+					using (var con = Sfi.ConnectionProvider.GetConnection())
+					using (var cmd = con.CreateCommand())
+					{
+						cmd.CommandText = @"BEGIN DBMS_RESULT_CACHE.FLUSH; END;";
+						cmd.Connection = con;
+						cmd.ExecuteNonQuery();
+					}
+
+					break;
+			}
+
 			Sfi?.Close();
 			_sessionFactory = null;
 			cfg = null;