Add test for a new Connector/NET bug.

Author: bgrainger

docs/content/tutorials/migrating-from-connector-net.md

@@ -248,3 +248,4 @@ The following bugs in Connector/NET are fixed by switching to MySqlConnector. (~
 * [#98322](https://bugs.mysql.com/bug.php?id=98322): `new MySqlConnection(null)` throws `NullReferenceException`
 * [#99091](https://bugs.mysql.com/bug.php?id=99091): Unexpected return value getting integer for `TINYINT(1)` column
 * [#99793](https://bugs.mysql.com/bug.php?id=99793): Prepared stored procedure command doesn't verify parameter types
+* [#100159](https://bugs.mysql.com/bug.php?id=100159): SQL with DateTime parameter returns String value

tests/SideBySide/QueryTests.cs

@@ -1254,6 +1254,24 @@ public void GetIntForTinyInt1(bool treatTinyAsBoolean, bool prepare)
 			Assert.False(reader.Read());
 		}
 
+#if !NETCOREAPP1_1_2
+		[SkippableFact(Baseline = "https://bugs.mysql.com/bug.php?id=100159")]
+		public void QueryDateTimeLiteral()
+		{
+			using var connection = new MySqlConnection(AppConfig.ConnectionString);
+			connection.Open();
+
+			string sql = "SELECT ?p0 as datevalue";
+			using var command = new MySqlCommand(sql, connection);
+			command.Parameters.AddWithValue("?p0", DateTime.UtcNow);
+
+			using var reader = command.ExecuteReader();
+			using var schema = reader.GetSchemaTable();
+			var providerType = (MySqlDbType) (int) schema.Rows[0]["ProviderType"];
+			Assert.Equal(MySqlDbType.DateTime, providerType);
+		}
+#endif
+
 		class BoolTest
 		{
 			public int Id { get; set; }