diff --git a/model/model.go b/model/model.go
index 4b9229d0e..97efe4322 100644
--- a/model/model.go
+++ b/model/model.go
@@ -216,13 +216,18 @@ type TableInfo struct {
 	Indices     []*IndexInfo  `json:"index_info"`
 	ForeignKeys []*FKInfo     `json:"fk_info"`
 	State       SchemaState   `json:"state"`
-	PKIsHandle  bool          `json:"pk_is_handle"`
-	Comment     string        `json:"comment"`
-	AutoIncID   int64         `json:"auto_inc_id"`
-	AutoIdCache int64         `json:"auto_id_cache"`
-	AutoRandID  int64         `json:"auto_rand_id"`
-	MaxColumnID int64         `json:"max_col_id"`
-	MaxIndexID  int64         `json:"max_idx_id"`
+	// PKIsHandle is true when primary key is a single integer column.
+	PKIsHandle bool `json:"pk_is_handle"`
+	// IsCommonHandle is true when clustered index feature is
+	// enabled and the primary key is not a single integer column.
+	IsCommonHandle bool `json:"is_common_handle"`
+
+	Comment     string `json:"comment"`
+	AutoIncID   int64  `json:"auto_inc_id"`
+	AutoIdCache int64  `json:"auto_id_cache"`
+	AutoRandID  int64  `json:"auto_rand_id"`
+	MaxColumnID int64  `json:"max_col_id"`
+	MaxIndexID  int64  `json:"max_idx_id"`
 	// UpdateTS is used to record the timestamp of updating the table's schema information.
 	// These changing schema operations don't include 'truncate table' and 'rename table'.
 	UpdateTS uint64 `json:"update_timestamp"`