Does golang sql Exec support variable arguments?

Question

How can I pass a function's variadic arguments to a SQL.db Exec function?

This code

func dbExecOne(db *sql.DB, cmd string, args ...interface{}) error {
    if _, err := db.Exec(cmd, args); err != nil {
        return fmt.Errorf("db execute[%s, %s] %q", cmd, args, err)
    }
    return nil
}  

Produces this error when called. If this can't be done, is there an alternate way, perhaps using a lambda to capture the command and args?

dbExecOne(db, "insert into junk values($1, $2)", 99, "foo")

  db execute[insert into junk values($1, $2), [%!s(int=99) foo]]
  "sql: converting argument $1 type: unsupported type []interface {}, a slice of interface"

Answer 1

You can always spread a slice's elements over variadic arguments with the ... operator, like this:

db.Exec(cmd, args...)

For more info see the language specification