Should we also close DB's .Prepare() in Golang?

Question

From this tutorial shown that rows.Closed() must be called where rows is from stmt.Query(), is stmt.Closed() also should be called where stmt is from db.Prepare()?

// inside a function
stmt, err := db.Prepare(cmd) // cmd is SQL string
Check(err)
// should we add: defer stmt.Close()
rows, err := stmt.Query(params) // params is map/interface{}
defer rows.Close()
Check(err)

Answer 1

The short answer is Yes. You should call stmt.Close();

The long answer can be found in this google groups thread.