Cr <******@****.***> 1675834841 +0800

		currentDatabase := m.DB.Migrator().CurrentDatabase()
		return m.DB.Raw("SELECT count(*) FROM information_schema.tables WHERE table_schema = ? AND table_name = ? AND table_type = ?", currentDatabase, stmt.Table, "BASE TABLE").Row().Scan(&count)
	})

	return count > 0
}

// RenameTable rename table from oldName to newName
func (m Migrator) RenameTable(oldName, newName interface{}) error {
	var oldTable, newTable interface{}

		t.Errorf("no error should happen, but got %v", err)
	}

	if name != "groupby" || total != 60 {
		t.Errorf("name should be groupby, but got %v, total should be 60, but got %v", name, total)
	}

	if err := DB.Model(&User{}).Select("name, sum(age)").Where("name = ?", "groupby").Group("users.name").Row().Scan(&name, &total); err != nil {

		}
	}
	return rows, err
}

func (db *PreparedStmtDB) QueryRowContext(ctx context.Context, query string, args ...interface{}) *sql.Row {
	stmt, err := db.prepare(ctx, db.ConnPool, false, query)
	if err == nil {
		return stmt.QueryRowContext(ctx, args...)
	}
	return &sql.Row{}
}

func (db *PreparedStmtDB) Ping() error {
	conn, err := db.GetDBConn()
	if err != nil {
		return err
	}

		*count = tx.RowsAffected
	}

	return
}

func (db *DB) Row() *sql.Row {
	tx := db.getInstance().Set("rows", false)
	tx = tx.callbacks.Row().Execute(tx)
	row, ok := tx.Statement.Dest.(*sql.Row)
	if !ok && tx.DryRun {
		db.Logger.Error(tx.Statement.Context, ErrDryRunModeUnsupported.Error())
	}
	return row
}

func (db *DB) Rows() (*sql.Rows, error) {
	tx := db.getInstance().Set("rows", true)

	updateCallback.Match(enableTransaction).Register("gorm:commit_or_rollback_transaction", CommitOrRollbackTransaction)
	updateCallback.Clauses = config.UpdateClauses

	rowCallback := db.Callback().Row()
	rowCallback.Register("gorm:row", RowQuery)
	rowCallback.Clauses = config.QueryClauses

	rawCallback := db.Callback().Raw()
	rawCallback.Register("gorm:raw", RawExec)
	rawCallback.Clauses = config.QueryClauses

	if err := DB.Order("id ASC").Find(&rows).Error; err != nil {
		t.Fatalf("find auto_increment_struct fail, err: %v", err)
	}

	ids := make([]int64, 0, len(rows))
	for _, row := range rows {
		ids = append(ids, row.ID)
	}
	lastID := ids[len(ids)-1]

	if err := DB.Where("id IN (?)", ids).Delete(&AutoIncrementStruct{}).Error; err != nil {
		t.Fatalf("delete auto_increment_struct fail, err: %v", err)
	}

	QueryContext(ctx context.Context, query string, args ...interface{}) (*sql.Rows, error)
	QueryRowContext(ctx context.Context, query string, args ...interface{}) *sql.Row
}

// SavePointerDialectorInterface save pointer interface
type SavePointerDialectorInterface interface {
	SavePoint(tx *DB, name string) error
	RollbackTo(tx *DB, name string) error
}

// TxBeginner tx beginner

	user3 := User{Name: "RowUser3", Age: 20}
	DB.Save(&user1).Save(&user2).Save(&user3)

	row := DB.Table("users").Where("name = ?", user2.Name).Select("age").Row()

	var age int64
	if err := row.Scan(&age); err != nil {
		t.Fatalf("Failed to scan age, got %v", err)
	}

	if age != 10 {
		t.Errorf("Scan with Row, age expects: %v, got %v", user2.Age, age)
	}

	table := "gorm.users"

}

func (cs *callbacks) Update() *processor {
	return cs.processors["update"]
}

func (cs *callbacks) Delete() *processor {
	return cs.processors["delete"]
}

func (cs *callbacks) Row() *processor {
	return cs.processors["row"]
}

func (cs *callbacks) Raw() *processor {
	return cs.processors["raw"]
}

func (p *processor) Execute(db *DB) *DB {
	// call scopes
	for len(db.Statement.scopes) > 0 {