Add context menu to display database tables stats (#639)

* Add context menu to display database tables stats

* Move table stats implementation into client

pkg/client/client.go

@@ -335,6 +335,10 @@ func (client *Client) TableConstraints(table string) (*Result, error) {
 	return res, err
 }
 
+func (client *Client) TablesStats() (*Result, error) {
+	return client.query(statements.TablesStats)
+}
+
 // Returns all active queriers on the server
 func (client *Client) Activity() (*Result, error) {
 	if client.serverType == cockroachType {

pkg/client/client_test.go

@@ -641,6 +641,25 @@ func testReadOnlyMode(t *testing.T) {
 	assert.NoError(t, err)
 }
 
+func testTablesStats(t *testing.T) {
+	columns := []string{
+		"schema_name",
+		"table_name",
+		"total_size",
+		"data_size",
+		"index_size",
+		"estimated_rows_count",
+		"estimated_rows",
+		"index_to_data_ratio",
+		"indexes_count",
+		"columns_count",
+	}
+
+	result, err := testClient.TablesStats()
+	assert.NoError(t, err)
+	assert.Equal(t, columns, result.Columns)
+}
+
 func TestAll(t *testing.T) {
 	if onWindows() {
 		t.Log("Unit testing on Windows platform is not supported.")
@@ -678,6 +697,7 @@ func TestAll(t *testing.T) {
 	testHistory(t)
 	testReadOnlyMode(t)
 	testDumpExport(t)
+	testTablesStats(t)
 
 	teardownClient()
 	teardown(t, true)