// [FirstOrInit]: https://gorm.io/docs/advanced_query.html#FirstOrInit
func (db *DB) Assign(attrs ...interface{}) (tx *DB) {
	tx = db.getInstance()
	tx.Statement.assigns = attrs
	return
}

// Unscoped disables the global scope of soft deletion in a query.
// By default, GORM uses soft deletion, marking records as "deleted"
// by setting a timestamp on a specific field (e.g., `deleted_at`).

		}); err == nil {
			t.Fatalf("nested transaction should returns error")
		}

		if err := tx.First(&User{}, "name = ?", user1.Name).Error; err != nil {
			t.Fatalf("Should not rollback record if disabled nested transaction support")
		}

		if err := tx.Transaction(func(tx2 *gorm.DB) error {
			tx2.Create(&user2)

			if err := tx2.First(&User{}, "name = ?", user2.Name).Error; err != nil {

const preparedStmtDBKey = "preparedStmt"

// Config GORM config
type Config struct {
	// GORM perform single create, update, delete operations in transactions by default to ensure database data integrity
	// You can disable it by setting `SkipDefaultTransaction` to true
	SkipDefaultTransaction bool
	// NamingStrategy tables, columns naming strategy
	NamingStrategy schema.Namer
	// FullSaveAssociations full save associations

)

var DB *gorm.DB
var (
	mysqlDSN     = "gorm:gorm@tcp(localhost:9910)/gorm?charset=utf8&parseTime=True&loc=Local"
	postgresDSN  = "user=gorm password=gorm dbname=gorm host=localhost port=9920 sslmode=disable TimeZone=Asia/Shanghai"
	sqlserverDSN = "sqlserver://gorm:LoremIpsum86@localhost:9930?database=gorm"
	tidbDSN      = "root:@tcp(localhost:9940)/test?charset=utf8&parseTime=True&loc=Local"
)

func init() {
	var err error