一般的なデータベースインターフェース sql.DB

GORM provides the method DB which returns a generic database interface *sql.DB from the current *gorm.DB

// Get generic database object sql.DB to use its functions
sqlDB, err := db.DB()

// Ping
sqlDB.Ping()

// Close
sqlDB.Close()

// Returns database statistics
sqlDB.Stats()

NOTE If the underlying database connection is not a *sql.DB, like in a transaction, it will returns error

Connection Pool

// Get generic database object sql.DB to use its functions
sqlDB, err := db.DB()

// SetMaxIdleConns sets the maximum number of connections in the idle connection pool.
sqlDB.SetMaxIdleConns(10)

// SetMaxOpenConns sets the maximum number of open connections to the database.
sqlDB.SetMaxOpenConns(100)

// SetConnMaxLifetime sets the maximum amount of time a connection may be reused.
sqlDB.SetConnMaxLifetime(time.Hour)