Improved example on readme

README.md

@@ -8,17 +8,33 @@ pgx is a pure Go driver and toolkit for PostgreSQL. It is usable through databas
 ## Example Usage
 
 ```go
-conn, err := pgx.Connect(context.Background(), os.Getenv("DATABASE_URL"))
+package main
-if err != nil {
-    fmt.Fprintf(os.Stderr, "Unable to connection to database: %v\n", err)
-    os.Exit(1)
-}
 
-var name string
+import (
-var weight int64
+	"context"
-err := conn.QueryRow(context.Background(), "select name, weight from widgets where id=$1", 42).Scan(&name, &weight)
+	"fmt"
-if err != nil {
+	"os"
-    return err
+
+	"github.com/jackc/pgx/v4"
+)
+
+func main() {
+	conn, err := pgx.Connect(context.Background(), os.Getenv("DATABASE_URL"))
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Unable to connection to database: %v\n", err)
+		os.Exit(1)
+	}
+	defer conn.Close(context.Background())
+
+	var name string
+	var weight int64
+	err = conn.QueryRow(context.Background(), "select name, weight from widgets where id=$1", 42).Scan(&name, &weight)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "QueryRow failed: %v\n", err)
+		os.Exit(1)
+	}
+
+	fmt.Println(name, weight)
 }
 ```