diff --git a/limereport/lrdatasourcemanager.cpp b/limereport/lrdatasourcemanager.cpp
index 09cf5c6..55ba747 100644
--- a/limereport/lrdatasourcemanager.cpp
+++ b/limereport/lrdatasourcemanager.cpp
@@ -229,6 +229,17 @@ DataSourceManager::DataSourceManager(QObject *parent) :
     setSystemVariable(QLatin1String("#IS_LAST_PAGEFOOTER"),false,FirstPass);
     setSystemVariable(QLatin1String("#IS_FIRST_PAGEFOOTER"),false,FirstPass);
     m_datasourcesModel.setDataSourceManager(this);
+
+    connect(&m_reportVariables, SIGNAL(variableHasBeenAdded(QString)),
+            this, SLOT(slotVariableHasBeenAdded(QString)) );
+    connect(&m_reportVariables, SIGNAL(variableHasBeenChanged(QString)),
+            this, SLOT(slotVariableHasBeenChanged(QString)));
+    connect(&m_userVariables, SIGNAL(variableHasBeenAdded(QString)),
+            this, SLOT(slotVariableHasBeenAdded(QString)) );
+    connect(&m_userVariables, SIGNAL(variableHasBeenChanged(QString)),
+            this, SLOT(slotVariableHasBeenChanged(QString)));
+
+
 }
 
 QString DataSourceManager::defaultDatabasePath() const
@@ -1188,6 +1199,7 @@ void DataSourceManager::changeVariable(const QString& name,const QVariant& value
     if (m_reportVariables.containsVariable(name)){
         m_reportVariables.changeVariable(name,value);
     }
+
 }
 
 void DataSourceManager::setSystemVariable(const QString &name, const QVariant &value, RenderPass pass)
@@ -1236,6 +1248,30 @@ void DataSourceManager::slotQueryTextChanged(const QString &queryName, const QSt
     }
 }
 
+void DataSourceManager::invalidateQueriesContainsVariable(const QString& variableName)
+{
+    foreach (const QString& datasourceName, dataSourceNames()){
+        QueryHolder* holder = dynamic_cast<QueryHolder*>(m_datasources.value(datasourceName));
+        if (holder){
+            QRegExp rx(QString(Const::NAMED_VARIABLE_RX).arg(variableName));
+            if  (holder->queryText().contains(rx))
+                holder->invalidate(designTime()?IDataSource::DESIGN_MODE:IDataSource::RENDER_MODE);
+        }
+    }
+}
+
+void DataSourceManager::slotVariableHasBeenAdded(const QString& variableName)
+{
+    //qDebug()<< "variable has been added"<< variableName;
+    invalidateQueriesContainsVariable(variableName);
+}
+
+void DataSourceManager::slotVariableHasBeenChanged(const QString& variableName)
+{
+    //qDebug()<< "variable has been changed"<< variableName;
+    invalidateQueriesContainsVariable(variableName);
+}
+
 void DataSourceManager::clear(ClearMethod method)
 {
     DataSourcesMap::iterator dit;
@@ -1386,6 +1422,15 @@ QVariant DataSourceManager::fieldDataByKey(const QString& datasourceName, const
     return QVariant();
 }
 
+void DataSourceManager::reopenDatasource(const QString& datasourceName)
+{
+    QueryHolder* qh = dynamic_cast<QueryHolder*>(dataSourceHolder(datasourceName));
+    if (qh){
+        qh->invalidate(designTime()?IDataSource::DESIGN_MODE:IDataSource::RENDER_MODE);
+        invalidateChildren(datasourceName);
+    }
+}
+
 QVariant DataSourceManager::variable(const QString &variableName)
 {
     if (m_userVariables.containsVariable(variableName))
diff --git a/limereport/lrdatasourcemanager.h b/limereport/lrdatasourcemanager.h
index 5483b55..285a258 100644
--- a/limereport/lrdatasourcemanager.h
+++ b/limereport/lrdatasourcemanager.h
@@ -160,14 +160,15 @@ public:
     QStringList dataSourceNames(const QString& connectionName);
     QStringList connectionNames();
     QStringList fieldNames(const QString& datasourceName);
-    bool containsField(const QString& fieldName);
-    QVariant fieldData(const QString& fieldName);
-    QVariant fieldDataByKey(
+    bool        containsField(const QString& fieldName);
+    QVariant    fieldData(const QString& fieldName);
+    QVariant    fieldDataByKey(
             const QString& datasourceName,
             const QString& valueFieldName,
             const QString& keyFieldName,
             QVariant keyValue
     );
+    void    reopenDatasource(const QString& datasourceName);
 
     QString extractDataSource(const QString& fieldName);
     QString extractFieldName(const QString& fieldName);
@@ -231,9 +232,12 @@ protected:
     void setLastError(const QString& value);
     void invalidateLinkedDatasources(QString datasourceName);
     bool checkConnection(QSqlDatabase db);
+    void invalidateQueriesContainsVariable(const QString& variableName);
 private slots:
     void slotConnectionRenamed(const QString& oldName,const QString& newName);
     void slotQueryTextChanged(const QString& queryName, const QString& queryText);
+    void slotVariableHasBeenAdded(const QString& variableName);
+    void slotVariableHasBeenChanged(const QString& variableName);
 private:
     explicit DataSourceManager(QObject *parent = 0);
     bool initAndOpenDB(QSqlDatabase &db, ConnectionDesc &connectionDesc);
diff --git a/limereport/lrscriptenginemanager.cpp b/limereport/lrscriptenginemanager.cpp
index 0780951..6ad79c6 100644
--- a/limereport/lrscriptenginemanager.cpp
+++ b/limereport/lrscriptenginemanager.cpp
@@ -813,6 +813,21 @@ bool ScriptEngineManager::createClearTableOfContensFunction()
     return addFunction(fd);
 }
 
+bool ScriptEngineManager::createReopenDatasourceFunction()
+{
+    JSFunctionDesc fd;
+    fd.setManager(m_functionManager);
+    fd.setManagerName(LimeReport::Const::FUNCTION_MANAGER_NAME);
+    fd.setCategory(tr("GENERAL"));
+    fd.setName("reopenDatasource");
+    fd.setDescription("reopenDatasource(\""+tr("datasourceName")+"\")");
+    fd.setScriptWrapper(QString("function reopenDatasource(datasourceName){"
+                                "return %1.reopenDatasource(datasourceName);}"
+                               ).arg(LimeReport::Const::FUNCTION_MANAGER_NAME)
+                        );
+    return addFunction(fd);
+}
+
 ScriptEngineManager::ScriptEngineManager()
     :m_model(0), m_dataManager(0)
 {
@@ -850,6 +865,7 @@ ScriptEngineManager::ScriptEngineManager()
 #endif
     createAddTableOfContensItemFunction();
     createClearTableOfContensFunction();
+    createReopenDatasourceFunction();
 
     m_model = new ScriptEngineModel(this);
 }
@@ -1516,6 +1532,12 @@ QVariant ScriptFunctionsManager::getFieldByKeyField(const QString& datasourceNam
     return dm->fieldDataByKey(datasourceName, valueFieldName, keyFieldName, keyValue);
 }
 
+void ScriptFunctionsManager::reopenDatasource(const QString& datasourceName)
+{
+    DataSourceManager* dm = scriptEngineManager()->dataManager();
+    return dm->reopenDatasource(datasourceName);
+}
+
 void ScriptFunctionsManager::addTableOfContensItem(const QString& uniqKey, const QString& content, int indent)
 {
     scriptEngineManager()->addTableOfContensItem(uniqKey, content, indent);
diff --git a/limereport/lrscriptenginemanager.h b/limereport/lrscriptenginemanager.h
index 162a21e..3edd6dc 100644
--- a/limereport/lrscriptenginemanager.h
+++ b/limereport/lrscriptenginemanager.h
@@ -319,6 +319,7 @@ public:
     Q_INVOKABLE QVariant getVariable(const QString& name);
     Q_INVOKABLE QVariant getField(const QString& field);
     Q_INVOKABLE QVariant getFieldByKeyField(const QString& datasourceName, const QString& valueFieldName, const QString& keyFieldName, QVariant keyValue);
+    Q_INVOKABLE void     reopenDatasource(const QString& datasourceName);
     Q_INVOKABLE QVariant color(const QString& color){ return  QColor(color);}
     Q_INVOKABLE void     addTableOfContensItem(const QString& uniqKey, const QString& content, int indent = 0);
     Q_INVOKABLE void     clearTableOfContens();
@@ -390,6 +391,7 @@ private:
     bool createGetFieldByKeyFunction();
     bool createAddTableOfContensItemFunction();
     bool createClearTableOfContensFunction();
+    bool createReopenDatasourceFunction();
 private:
     ScriptEngineManager();
     ScriptEngineType*  m_scriptEngine;
diff --git a/limereport/lrvariablesholder.cpp b/limereport/lrvariablesholder.cpp
index dd46b4e..9cdf630 100644
--- a/limereport/lrvariablesholder.cpp
+++ b/limereport/lrvariablesholder.cpp
@@ -61,6 +61,7 @@ void VariablesHolder::addVariable(const QString& name, const QVariant& value, Va
         m_varNames.insert(name,varValue);
         if (type==VarDesc::Report)
             m_userVariables.append(varValue);
+        emit variableHasBeenAdded(name);
     } else {
         throw ReportError(tr("variable with name ")+name+tr(" already exists!"));
     }
@@ -86,6 +87,7 @@ void VariablesHolder::deleteVariable(const QString &name)
         m_userVariables.removeOne(m_varNames.value(name));
         delete m_varNames.value(name);
         m_varNames.remove(name);
+        emit variableHasBennDeleted(name);
     }
 }
 
@@ -93,6 +95,7 @@ void VariablesHolder::changeVariable(const QString &name, const QVariant &value)
 {
     if(m_varNames.contains(name)) {
         m_varNames.value(name)->setValue(value);
+        emit variableHasBeenChanged(name);
     } else
         throw ReportError(tr("variable with name ")+name+tr(" does not exists!"));
 }
diff --git a/limereport/lrvariablesholder.h b/limereport/lrvariablesholder.h
index ede1ac6..e375ea8 100644
--- a/limereport/lrvariablesholder.h
+++ b/limereport/lrvariablesholder.h
@@ -92,6 +92,9 @@ public:
     int userVariablesCount();
     VarDesc* userVariableAt(int index);
 signals:
+    void variableHasBeenAdded(const QString& variableName);
+    void variableHasBeenChanged(const QString& variableName);
+    void variableHasBennDeleted(const QString& variableName);
 private:
     QMap<QString,VarDesc*> m_varNames;
     QList<VarDesc*> m_userVariables;