fix: fix gob encoding (#2639) (#2641)

Signed-off-by: Song Gao <[email protected]>

internal/pkg/store/encoding/encoding_test.go

@@ -0,0 +1,26 @@
+// Copyright 2024 EMQ Technologies Co., Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package encoding
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestEncoding(t *testing.T) {
+	_, err := Encode([]interface{}{1, nil, "2"})
+	require.NoError(t, err)
+}

internal/xsql/gob_register.go

@@ -24,4 +24,5 @@ func init() {
 	gob.Register(make(map[string]interface{}))
 	gob.Register(make(map[string][]*Tuple))
 	gob.Register(Tuple{})
+	gob.Register([]interface{}{})
 }