Support enum parameter values. Fixes #255

Author: bgrainger

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

@@ -63,4 +63,5 @@ may execute differently with MySqlConnector. To get Connector/NET-compatible beh
 * [#81650](https://bugs.mysql.com/bug.php?id=81650): `Server` connection string option may now contain multiple, comma separated hosts that will be tried in order until a connection succeeds
 * [#83229](https://bugs.mysql.com/bug.php?id=83329): "Unknown command" exception inserting large blob with UseCompression=True
 * [#84220](https://bugs.mysql.com/bug.php?id=84220): Cannot call a stored procedure with `.` in its name
+* [#84701](https://bugs.mysql.com/bug.php?id=84701): Can't create a paramter using a 64-bit enum with a value greater than int.MaxValue
 * [#85185](https://bugs.mysql.com/bug.php?id=85185): `ConnectionReset=True` does not preserve connection charset

src/MySqlConnector/MySqlClient/MySqlParameter.cs

@@ -193,6 +193,10 @@ internal void AppendSqlString(BinaryWriter writer, StatementPreparerOptions opti
 			{
 				writer.WriteUtf8("{0}".FormatInvariant((ulong) Value));
 			}
+			else if (Value is Enum)
+			{
+				writer.WriteUtf8("{0:d}".FormatInvariant(Value));
+			}
 			else
 			{
 				throw new NotSupportedException("Parameter type {0} (DbType: {1}) not currently supported. Value: {2}".FormatInvariant(Value.GetType().Name, DbType, Value));

tests/SideBySide/QueryTests.cs

@@ -662,6 +662,52 @@ public void OutputParameter()
 			}
 		}
 
+		[Fact]
+		public void EnumParameter()
+		{
+			m_database.Connection.Execute(@"drop table if exists enum_test;
+create table enum_test(id integer not null primary key, value text not null);
+insert into enum_test (id, value) VALUES (1002, 'no'), (1003, 'yes');
+");
+
+			using (var command = new MySqlCommand("select * from enum_test where id = @ID;", m_database.Connection))
+			{
+				command.Parameters.AddWithValue("@ID", MySqlErrorCode.No);
+				using (var reader = command.ExecuteReader())
+				{
+					Assert.True(reader.Read());
+					Assert.Equal((int) MySqlErrorCode.No, reader.GetInt32(0));
+					Assert.Equal("no", reader.GetString(1));
+					Assert.False(reader.Read());
+				}
+			}
+		}
+
+		[Fact
+#if BASELINE
+			(Skip = "https://bugs.mysql.com/bug.php?id=84701")
+#endif
+		]
+		public void Int64EnumParameter()
+		{
+			m_database.Connection.Execute(@"drop table if exists long_enum_test;
+create table long_enum_test(id bigint not null primary key, value integer not null);
+insert into long_enum_test (id, value) VALUES (0x7FFFFFFFFFFFFFFF, 1);
+");
+
+			using (var command = new MySqlCommand("select * from long_enum_test where id = @ID;", m_database.Connection))
+			{
+				command.Parameters.AddWithValue("@ID", TestLongEnum.Value);
+				using (var reader = command.ExecuteReader())
+				{
+					Assert.True(reader.Read());
+					Assert.Equal(long.MaxValue, reader.GetInt64(0));
+					Assert.Equal(1, reader.GetInt32(1));
+					Assert.False(reader.Read());
+				}
+			}
+		}
+
 		class BoolTest
 		{
 			public int Id { get; set; }
@@ -681,6 +727,11 @@ public UseReaderWithoutDisposingThreadData(List<Exception> exceptions, MySqlConn
 			public MySqlConnectionStringBuilder ConnectionStringBuilder { get; }
 		}
 
+		enum TestLongEnum : long
+		{
+			Value = long.MaxValue,
+		}
+
 		readonly DatabaseFixture m_database;
 	}
 }