Add new menu item to show the row counts of all tables

This adds a new action to the Tools menu which creates a new SQL tab
with a statement to count the number of rows of all tables and views.

See issue #2464.

src/MainWindow.cpp

@@ -1834,6 +1834,7 @@ void MainWindow::activateFields(bool enable)
     ui->actionQuickCheck->setEnabled(enable);
     ui->actionForeignKeyCheck->setEnabled(enable);
     ui->actionOptimize->setEnabled(enable);
+    ui->actionRowCounts->setEnabled(enable);
     ui->dockEdit->setEnabled(enable);
     ui->dockPlot->setEnabled(enable);
 
@@ -3384,13 +3385,20 @@ void MainWindow::runSqlNewTab(const QString& query, const QString& title, const
     else
         message = tr("This action will open a new SQL tab with the following statements for you to edit and run:");
 
-    message += QString("<blockquote><tt>%1</tt></blockquote>").arg(query) +
-               tr("Press Help for opening the corresponding SQLite reference page.");
+    message += QString("<blockquote><tt>%1</tt></blockquote>").arg(query.size() > 1000 ? query.left(1000) + "\n[...]" : query);
+    if(!helpUrl.isEmpty())
+            message += tr("Press Help for opening the corresponding SQLite reference page.");
 
     QString windowTitle = title;
     windowTitle.remove('&');
+    auto result = QMessageBox::information(this,
+                                           windowTitle,
+                                           message,
+                                           QMessageBox::Ok | QMessageBox::Default,
+                                           QMessageBox::Cancel | QMessageBox::Escape,
+                                           helpUrl.isEmpty() ? 0 : QMessageBox::Help);
 
-    switch (QMessageBox::information(this, windowTitle, message, QMessageBox::Ok | QMessageBox::Default, QMessageBox::Cancel | QMessageBox::Escape, QMessageBox::Help))
+    switch (result)
     {
     case QMessageBox::Ok: {
         if (ui->mainTab->indexOf(ui->query) == -1)
@@ -3763,3 +3771,21 @@ QList<TableBrowserDock*> MainWindow::allTableBrowserDocks() const
 {
     return ui->tabBrowsers->findChildren<TableBrowserDock*>();
 }
+
+void MainWindow::newRowCountsTab()
+{
+    QString sql;
+    for(const auto& it : db.schemata["main"])
+    {
+        if(it.second->type() == sqlb::Object::Table || it.second->type() == sqlb::Object::View)
+        {
+            sql += QString("SELECT %1 AS \"name\", %2 AS \"type\", COUNT(*) AS \"rows\" FROM %3\nUNION ").arg(
+                        QString::fromStdString(sqlb::escapeString(it.second->name())),
+                        QString::fromStdString(sqlb::escapeString(it.second->typeToString(it.second->type()))),
+                        QString::fromStdString(sqlb::escapeIdentifier(it.second->name())));
+        }
+    }
+    sql.chop(7);    // Remove the last "\nUNION " at the end
+
+    runSqlNewTab(sql, ui->actionRowCounts->text());
+}

src/MainWindow.h

@@ -217,7 +217,7 @@ private slots:
     void openFindReplaceDialog();
     void toggleSqlBlockComment();
     void openSqlPrintDialog();
-    void runSqlNewTab(const QString& query, const QString& title, const QString& helpUrl, const bool autoRun = true);
+    void runSqlNewTab(const QString& query, const QString& title, const QString& helpUrl = QString(), const bool autoRun = true);
     void printDbStructure();
     void updateDatabaseBusyStatus(bool busy, const QString& user);
     void openPreferences();
@@ -226,6 +226,7 @@ private slots:
     void saveSqlFile(int tabIndex);
     void saveAll();
     void openUrlOrFile(const QString& urlString);
+    void newRowCountsTab();
 
     int openSqlTab(bool resetCounter = false);
     void closeSqlTab(int index, bool force = false, bool askSaving = true);

src/MainWindow.ui

@@ -852,6 +852,7 @@ You can drag SQL statements from an object row and drop them into other applicat
     <addaction name="actionQuickCheck"/>
     <addaction name="actionForeignKeyCheck"/>
     <addaction name="actionOptimize"/>
+    <addaction name="actionRowCounts"/>
    </widget>
    <addaction name="fileMenu"/>
    <addaction name="editMenu"/>
@@ -2228,6 +2229,14 @@ You can drag SQL statements from the Schema column and drop them into the SQL ed
     <string>This treats the current clipboard contents as a CSV file and opens the same import wizard that is used for importing CSV data from a file.</string>
    </property>
   </action>
+  <action name="actionRowCounts">
+   <property name="text">
+    <string>Show Row Counts</string>
+   </property>
+   <property name="toolTip">
+    <string>This shows the number of rows for each table and view in the database.</string>
+   </property>
+  </action>
  </widget>
  <customwidgets>
   <customwidget>
@@ -3666,6 +3675,22 @@ You can drag SQL statements from the Schema column and drop them into the SQL ed
     </hint>
    </hints>
   </connection>
+  <connection>
+   <sender>actionRowCounts</sender>
+   <signal>triggered()</signal>
+   <receiver>MainWindow</receiver>
+   <slot>newRowCountsTab()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>-1</x>
+     <y>-1</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>518</x>
+     <y>314</y>
+    </hint>
+   </hints>
+  </connection>
  </connections>
  <slots>
   <slot>fileOpen()</slot>
@@ -3727,5 +3752,6 @@ You can drag SQL statements from the Schema column and drop them into the SQL ed
   <slot>changeTableBrowserTab(int)</slot>
   <slot>renameTableBrowserTab(int)</slot>
   <slot>showContextMenuTableBrowserTabBar(QPoint)</slot>
+  <slot>newRowCountsTab()</slot>
  </slots>
 </ui>