diff --git a/pkg/service/reflect.go b/pkg/service/reflect.go
index 89f548ed6..b60c0c337 100644
--- a/pkg/service/reflect.go
+++ b/pkg/service/reflect.go
@@ -40,6 +40,10 @@ func placeholdersOf(record interface{}) []string {
 	for i := 0; i < rt.NumField(); i++ {
 		fieldType := rt.Field(i)
 		if tag, ok := fieldType.Tag.Lookup("db"); ok {
+			if tag == "gid" {
+				continue
+			}
+
 			dbFields = append(dbFields, ":"+tag)
 		}
 	}
@@ -61,6 +65,10 @@ func fieldsNamesOf(record interface{}) []string {
 	for i := 0; i < rt.NumField(); i++ {
 		fieldType := rt.Field(i)
 		if tag, ok := fieldType.Tag.Lookup("db"); ok {
+			if tag == "gid" {
+				continue
+			}
+
 			dbFields = append(dbFields, tag)
 		}
 	}
@@ -68,6 +76,23 @@ func fieldsNamesOf(record interface{}) []string {
 	return dbFields
 }
 
+func ParseStructTag(s string) (string, map[string]string) {
+	opts := make(map[string]string)
+	ss := strings.Split(s, ",")
+	if len(ss) > 1 {
+		for _, opt := range ss[1:] {
+			aa := strings.SplitN(opt, "=", 2)
+			if len(aa) == 2 {
+				opts[aa[0]] = aa[1]
+			} else {
+				opts[aa[0]] = ""
+			}
+		}
+	}
+
+	return ss[0], opts
+}
+
 type ReflectCache struct {
 	tableNames   map[string]string
 	fields       map[string][]string
diff --git a/pkg/service/reflect_test.go b/pkg/service/reflect_test.go
index fa19056b7..9eb525ae9 100644
--- a/pkg/service/reflect_test.go
+++ b/pkg/service/reflect_test.go
@@ -58,7 +58,7 @@ func Test_fieldsNamesOf(t *testing.T) {
 		{
 			name: "MarginInterest",
 			args: args{record: &types.MarginInterest{}},
-			want: []string{"gid", "exchange", "asset", "principle", "interest", "interest_rate", "isolated_symbol", "time"},
+			want: []string{"exchange", "asset", "principle", "interest", "interest_rate", "isolated_symbol", "time"},
 		},
 	}
 	for _, tt := range tests {