// mysql
db, err := sqlx.Open("mysql", dsn)
if err != nil {
  return "", err
}
apartment := goapartment.ProvideApartment(db)
conn, err := apartment.TenantExecConn(ctx, "tenantName")
if err != nil {
  return "", errors.New("can not open sqlx.Conn")
}
query := "SELECT DATABASE()"
row := conn.QueryRowContext(ctx, query)
var dbName string
if err := row.Scan(&dbName); err != nil {
  return "", err
}
return dbName, nil

// mysql
db, err := sqlx.Open("mysql", dsn)
if err != nil {
  return "", err
}
apartment := goapartment.ProvideApartment(db)
tx, err := apartment.TenantExecTx(ctx, "tenantName", nil)
if err != nil {
  return "", errors.New("can not open sqlx.Conn")
}
query := "SELECT DATABASE()"
row := tx.QueryRowContext(ctx, query)
var dbName string
if err := row.Scan(&dbName); err != nil {
  _ = tx.Rollback()
  return "", err
}
if err = tx.Commit(); err != nil {
  return "", err
}
return dbName, nil