What version of Go are you using (go version)?

$ go version
go version go1.15.1 linux/amd64

Does this issue reproduce with the latest release?

This is a interface extension proposal for database/sql.DB struct.

What do you want to do?

I want to inspect state of DB instance configuration set via

    func (db *DB) SetConnMaxIdleTime(d time.Duration)
    func (db *DB) SetConnMaxLifetime(d time.Duration)
    func (db *DB) SetMaxIdleConns(n int)
    func (db *DB) SetMaxOpenConns(n int)

What did you expect to see?

Methods returning current values, i.e

    func (db *DB) ConnMaxIdleTime() time.Duration
    func (db *DB) ConnMaxLifetime() time.Duration
    func (db *DB) MaxIdleConns() int
    func (db *DB) MaxOpenConns() int

or additional fields in DBStats struct, currently there's just MaxOpenConnections.