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

问题

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)

回答1:

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

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

回答2:

Use as follows

// inside a function
stmt, err := db.Prepare(cmd) // cmd is SQL string
if err != nil {
    println(err.Error())
}
defer stmt.Close()
rows, err := stmt.Query(params) // params is map/interface{}

if err != nil {
    println(err.Error())
}

来源：https://stackoverflow.com/questions/27287894/should-we-also-close-dbs-prepare-in-golang