diff --git a/pglab/FunctionsPage.cpp b/pglab/FunctionsPage.cpp
index 5745030..9b8dd03 100644
--- a/pglab/FunctionsPage.cpp
+++ b/pglab/FunctionsPage.cpp
@@ -4,13 +4,33 @@
 #include "CustomDataRole.h"
 #include "PgLabItemDelegate.h"
 #include "ProcTableModel.h"
+#include "SqlCodePreview.h"
+#include <QApplication>
 #include <QTableView>
 #include <QVBoxLayout>
+#include <QTabWidget>
 
-FunctionsPage::FunctionsPage(QWidget *parent) : QWidget(parent)
+FunctionsPage::FunctionsPage(QWidget *parent)
+	: QSplitter(Qt::Horizontal, parent)
 {
-
+	// create widgets
 	m_functionTable = new QTableView(this);
+	m_detailTabs = new QTabWidget(this);
+	m_definitionView = new SqlCodePreview(this);
+
+	// build widget tree
+	// add top level widgets to splitter
+	addWidget(m_functionTable);
+	addWidget(m_detailTabs);
+
+	// add widgets to detail tabs
+	m_detailTabs->addTab(m_definitionView, "SQL");
+
+//	auto mainLayout = new QVBoxLayout;
+//	mainLayout->addWidget(m_functionTable);
+//	setLayout(mainLayout);
+
+	// Do further initialization of widgets and models
 	SetTableViewDefault(m_functionTable);
 
 	m_model = new ProcTableModel(this);
@@ -23,14 +43,21 @@ FunctionsPage::FunctionsPage(QWidget *parent) : QWidget(parent)
 	auto item_delegate = new PgLabItemDelegate(this);
 	m_functionTable->setItemDelegate(item_delegate);
 
-	auto mainLayout = new QVBoxLayout;
-	mainLayout->addWidget(m_functionTable);
-	setLayout(mainLayout);
+
+	connect(m_functionTable->selectionModel(), &QItemSelectionModel::currentRowChanged, this,
+			&FunctionsPage::functionTable_currentRowChanged);
+
+
+	retranslateUi();
 }
 
-void FunctionsPage::retranslateUi(bool all)
+void FunctionsPage::retranslateUi()
 {
+	auto set_tabtext = [this] (QWidget *widget, QString translation) {
+		m_detailTabs->setTabText(m_detailTabs->indexOf(widget), translation);
+	};
 
+	set_tabtext(m_definitionView, QApplication::translate("FunctionsPage", "SQL", nullptr));
 }
 
 void FunctionsPage::setCatalog(std::shared_ptr<const PgDatabaseCatalog> cat)
@@ -38,3 +65,34 @@ void FunctionsPage::setCatalog(std::shared_ptr<const PgDatabaseCatalog> cat)
 	m_catalog = cat;
 	m_model->setCatalog(cat);
 }
+
+void FunctionsPage::functionTable_currentRowChanged(const QModelIndex &current, const QModelIndex &previous)
+{
+	if (current.row() != previous.row()) {
+		if (current.isValid()) {
+			auto source_index = m_sortFilterProxy->mapToSource(current);
+			auto proc = m_model->proc(source_index.row());
+
+			selectedProcChanged(proc);
+		}
+		else
+			selectedProcChanged({});
+	}
+}
+
+void FunctionsPage::selectedProcChanged(const std::optional<PgProc> &proc)
+{
+
+	updateSqlTab(proc);
+}
+
+void FunctionsPage::updateSqlTab(const std::optional<PgProc> &proc)
+{
+	if (!proc.has_value()) {
+		m_definitionView->clear();
+		return;
+	}
+	QString create_sql = proc->createSql();
+
+	m_definitionView->setPlainText(create_sql);
+}
diff --git a/pglab/FunctionsPage.h b/pglab/FunctionsPage.h
index 805825a..a82969f 100644
--- a/pglab/FunctionsPage.h
+++ b/pglab/FunctionsPage.h
@@ -1,15 +1,19 @@
 #ifndef FUNCTIONSPAGE_H
 #define FUNCTIONSPAGE_H
 
-#include <QWidget>
+#include <QSplitter>
 #include <memory>
+#include <optional>
 
 class QTableView;
 class PgDatabaseCatalog;
 class ProcTableModel;
 class CustomFilterSortModel;
+class QTabWidget;
+class SqlCodePreview;
+class PgProc;
 
-class FunctionsPage : public QWidget {
+class FunctionsPage : public QSplitter {
 	Q_OBJECT
 public:
 	explicit FunctionsPage(QWidget *parent = nullptr);
@@ -19,14 +23,19 @@ signals:
 
 public slots:
 
+	void functionTable_currentRowChanged(const QModelIndex &current, const QModelIndex &previous);
 private:
 	QTableView *m_functionTable = nullptr;
+	QTabWidget *m_detailTabs = nullptr;
+	SqlCodePreview *m_definitionView = nullptr;
 	ProcTableModel *m_model = nullptr;
 	CustomFilterSortModel *m_sortFilterProxy = nullptr;
 	std::shared_ptr<const PgDatabaseCatalog> m_catalog;
 
-	void retranslateUi(bool all = true);
+	void retranslateUi();
 
+	void selectedProcChanged(const std::optional<PgProc> &proc);
+	void updateSqlTab(const std::optional<PgProc> &proc);
 };
 
 #endif // FUNCTIONSPAGE_H
diff --git a/pglab/TablesPage.cpp b/pglab/TablesPage.cpp
index b6dbaf1..5429167 100644
--- a/pglab/TablesPage.cpp
+++ b/pglab/TablesPage.cpp
@@ -170,7 +170,6 @@ void TablesPage::tableListTable_layoutChanged(const QList<QPersistentModelIndex>
 void TablesPage::selectedTableChanged(const std::optional<PgClass> &table)
 {
 	m_columnsPage->setData(m_catalog, table);
-	//ui->columnsTable->resizeColumnsToContents();
 
 	m_constraintModel->setData(m_catalog, table);
 	ui->constraintsTable->resizeColumnsToContents();