diff --git a/proxy/backend/core/src/main/java/org/apache/shardingsphere/proxy/backend/handler/distsql/ral/updatable/LockClusterExecutor.java b/proxy/backend/core/src/main/java/org/apache/shardingsphere/proxy/backend/handler/distsql/ral/updatable/LockClusterExecutor.java
index 73d2bb59f26da..f490b58143aea 100644
--- a/proxy/backend/core/src/main/java/org/apache/shardingsphere/proxy/backend/handler/distsql/ral/updatable/LockClusterExecutor.java
+++ b/proxy/backend/core/src/main/java/org/apache/shardingsphere/proxy/backend/handler/distsql/ral/updatable/LockClusterExecutor.java
@@ -44,6 +44,7 @@ public void executeUpdate(final LockClusterStatement sqlStatement, final Context
         checkAlgorithm(sqlStatement);
         LockContext lockContext = contextManager.getComputeNodeInstanceContext().getLockContext();
         GlobalLockDefinition lockDefinition = new GlobalLockDefinition(new ClusterLock());
+        // TODO should configured in SQL Statement
         if (lockContext.tryLock(lockDefinition, 3000L)) {
             try {
                 checkState(contextManager);
diff --git a/proxy/backend/core/src/main/java/org/apache/shardingsphere/proxy/backend/handler/distsql/ral/updatable/UnlockClusterExecutor.java b/proxy/backend/core/src/main/java/org/apache/shardingsphere/proxy/backend/handler/distsql/ral/updatable/UnlockClusterExecutor.java
index d9d28b883f875..9b744e649564d 100644
--- a/proxy/backend/core/src/main/java/org/apache/shardingsphere/proxy/backend/handler/distsql/ral/updatable/UnlockClusterExecutor.java
+++ b/proxy/backend/core/src/main/java/org/apache/shardingsphere/proxy/backend/handler/distsql/ral/updatable/UnlockClusterExecutor.java
@@ -39,6 +39,7 @@ public void executeUpdate(final UnlockClusterStatement sqlStatement, final Conte
         checkState(contextManager);
         LockContext lockContext = contextManager.getComputeNodeInstanceContext().getLockContext();
         GlobalLockDefinition lockDefinition = new GlobalLockDefinition(new ClusterLock());
+        // TODO should configured in SQL Statement
         if (lockContext.tryLock(lockDefinition, 3000L)) {
             try {
                 checkState(contextManager);