diff --git a/distributeddatamgr/relational_store/include/relational_store.h b/distributeddatamgr/relational_store/include/relational_store.h
index 471e486498c2e19254dc14808b7a3727b72dd0fb..66654b2e5f92648d644eb1d6bce42e698fb8a19e 100644
--- a/distributeddatamgr/relational_store/include/relational_store.h
+++ b/distributeddatamgr/relational_store/include/relational_store.h
@@ -95,6 +95,25 @@ typedef enum Rdb_SecurityArea {
     RDB_SECURITY_AREA_EL4,
 } Rdb_SecurityArea;
 
+/**
+* @brief High availability mode.
+*
+* @since 12
+*/
+typedef enum Rdb_HAMode {
+    /**
+    * @brief Single database.
+    * @since 12
+    */
+    HA_SINGLE = 0,
+
+    /**
+    * @brief Real-time dual-write backup database.
+    * @since 12
+    */
+    HA_MASTER_SLAVER,
+} Rdb_HAMode;
+
 /**
  * @brief Manages relational database configurations.
  *
@@ -136,6 +155,12 @@ typedef struct {
      * @since 11
      */
     int area;
+    /**
+     * High availability mode.
+     *
+     * @since 12
+     */
+    int haMode;
 } OH_Rdb_Config;
 #pragma pack()