Added plan of tests

go-code-samples/database-sql-package-goproject/prepared/prepared.go

@@ -0,0 +1,73 @@
+package main
+
+import (
+	"database/sql"
+	"fmt"
+	"log"
+	"os"
+
+	"github.com/go-sql-driver/mysql"
+)
+
+var db *sql.DB
+
+type Album struct {
+	ID       int64
+	Title    string
+	Artist   string
+	Price    float32
+	Quantity int64
+}
+
+func main() {
+	// Capture connection properties.
+	cfg := mysql.Config{
+		User:   os.Getenv("DBUSER"),
+		Passwd: os.Getenv("DBPASS"),
+		Net:    "tcp",
+		Addr:   "127.0.0.1:3306",
+		DBName: "recordings",
+	}
+	// Get a database handle.
+	var err error
+	db, err = sql.Open("mysql", cfg.FormatDSN())
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	pingErr := db.Ping()
+	if pingErr != nil {
+		log.Fatal(pingErr)
+	}
+	fmt.Println("Connected!")
+
+	// Hard-code ID 2 here to test the query.
+	Album, err := albumByID(2)
+	if err != nil {
+		log.Fatal(err)
+	}
+	fmt.Printf("Album found: %v\n", Album)
+}
+
+// AlbumByID retrieves the specified album.
+func albumByID(id int) (Album, error) {
+	// Define a prepared statement. You'd typically define the statement
+	// elsewhere and save it for use in functions such as this one.
+	stmt, err := db.Prepare("SELECT * FROM album WHERE id = ?")
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	var album Album
+
+	// Execute the prepared statement, passing in an id value for the
+	// parameter whose placeholder is ?
+	err = stmt.QueryRow(id).Scan(&album.ID, &album.Title, &album.Artist, &album.Price, &album.Quantity)
+	if err != nil {
+		if err == sql.ErrNoRows {
+			// Handle the case of no rows returned.
+		}
+		return album, err
+	}
+	return album, nil
+}