diff --git a/include/sqlQueryExecutor.h b/include/sqlQueryExecutor.h
index d8b56ee..5a952e8 100644
--- a/include/sqlQueryExecutor.h
+++ b/include/sqlQueryExecutor.h
@@ -21,6 +21,7 @@ public:
     bool addModel(const QString&, Model&);
     bool modelNameExistsInDB(const QString&, const QString&);
     bool modelTypeExistsInDB(const QString&, const QString&);
+    bool removeMode(const QString&, int);
 
 signals:
     void errorOccurred(const QString& error);
diff --git a/source/dbStructureView.cpp b/source/dbStructureView.cpp
index e08cb43..bb6bec8 100644
--- a/source/dbStructureView.cpp
+++ b/source/dbStructureView.cpp
@@ -93,17 +93,20 @@ const QString DBStructureView::curConnection()
 
 void DBStructureView::itemDoubleClick(const QModelIndex& index)
 {
-    if(!m_curConnection.isEmpty()) //先断掉当前链接
-    {
-        disconnectToDB(m_curConnection);
-        m_curConnection = "";
-    }
-
     DBStructureNode* node = static_cast<DBStructureNode*>(index.internalPointer());
-    if(node->type() == ConnectionNode && node->status() == Disconnect)
+    if(node->type() == ConnectionNode )
     {
-        connectToDB(node->name());
-        m_curConnection = node->name();
+        if(!m_curConnection.isEmpty()) //先断掉当前链接
+        {
+            disconnectToDB(m_curConnection);
+            m_curConnection = "";
+        }
+
+        if(node->status() == Disconnect)
+        {
+            connectToDB(node->name());
+            m_curConnection = node->name();
+        }
     }
 }
 
diff --git a/source/sqlQueryExecutor.cpp b/source/sqlQueryExecutor.cpp
index a9d2e73..6d9d7b8 100644
--- a/source/sqlQueryExecutor.cpp
+++ b/source/sqlQueryExecutor.cpp
@@ -169,7 +169,10 @@ bool SqlQueryExecutor::modelTypeExistsInDB(const QString& connectionName, const
     return exists;
 }
 
+bool SqlQueryExecutor::removeMode(const QString& connectionName, int modelID)
+{
 
+}
 
 const QVector<AttributeGroup> SqlQueryExecutor::getAttributeGroup(const QString& strConnectionName)
 {