Golang Result.RowsAffected方法代碼示例

/**
 * SetInc
 * @param  fieldname string
 * @param  value int
 * @return rows,error
 */
func (this *Sql) SetInc(field string, value int) (int64, error) {
	sqlstr := " UPDATE " + this.tableName + " "
	sqlstr += " SET "
	field_filted := this.convertValue2String(field)
	sqlstr += field_filted + " = " + field_filted + " + " + this.convertValue2String(value)
	sqlstr += " WHERE "
	sqlstr += this.conditionSql
	//slimSqlLog("SETINC", sqlstr)
	var r sql.Result
	var err error
	if this.tx != nil {
		r, err = this.tx.Exec(sqlstr)
	} else {
		r, err = this.getDbW().Exec(sqlstr)
	}
	if err != nil {
		slimSqlLog("ERROR", sqlstr)
		return 0, err
	} else {
		num, err := r.RowsAffected()
		if err != nil {
			return 0, err
		} else {
			return num, nil
		}
	}
}

func NewOrUpdateUser(db *sql.DB, user *User) error {
	var err error
	var res sql.Result
	if user.Id == "" {
		res, err = db.Exec("INSERT INTO users(firstName, lastName) VALUES(?,?)", user.FirstName, user.LastName)
	} else {
		res, err = db.Exec("UPDATE users SET firstName=?, lastName=? WHERE id=?", user.FirstName, user.LastName, user.Id)
	}
	if err != nil {
		return err
	}
	lastId, err := res.LastInsertId()
	if err != nil {
		return err
	}
	rowCnt, err := res.RowsAffected()
	if err != nil {
		return err
	}
	if rowCnt != 1 {
		return errors.New(fmt.Sprintf("Row count (%s) and/or lastId (%s) are wrong.", lastId, rowCnt))
	}

	return nil
}

/* **
執行更新操作
param1 表名
param2 柱頭
parma3 條件
param4 參數
return 影響行數，錯誤
** */
func (self *MDB) execUpdate(tableName, cols, condition string, args ...interface{}) (int64, error) {
	tx, err := self.Begin()
	if err != nil {
		return 0, err
	}
	if condition == "" || len(args) == 0 {
		return 0, errors.New("條件和參數都不能為空！")
	}
	stmt, err := tx.Prepare(fmt.Sprintf("UPDATE %s SET %s WHERE %s", tableName, cols, condition))
	if err != nil {
		return 0, err
	}
	var result sql.Result
	if result, err = stmt.Exec(args...); err != nil {
		return 0, err
	}
	defer stmt.Close()
	if err = tx.Commit(); err != nil {
		return 0, err
	}
	if affected, err := result.RowsAffected(); err != nil {
		return 0, err
	} else {
		return affected, nil
	}
}

func (this *mysql) Exec(query string, args ...interface{}) (afftectedRows int64,
	lastInsertId int64, err error) {
	if this.db == nil {
		return 0, 0, ErrNotOpen
	}
	if this.breaker.Open() {
		return 0, 0, ErrCircuitOpen
	}

	var result sql.Result
	result, err = this.db.Exec(query, args...)
	if err != nil {
		if this.isSystemError(err) {
			log.Warn("mysql exec breaks: %s", err.Error())
			this.breaker.Fail()
		}

		return 0, 0, err
	}

	afftectedRows, err = result.RowsAffected()
	if err != nil {
		if this.isSystemError(err) {
			log.Warn("mysql exec2 breaks: %s", err.Error())
			this.breaker.Fail()
		}
	} else {
		this.breaker.Succeed()
	}

	lastInsertId, _ = result.LastInsertId()
	return
}

//Update ...
func (vs VictualService) Update(victual *Victual) *Victual {
	db, err := sql.Open("postgres", "host=localhost port=5432 user=pober dbname=pober sslmode=disable")
	checkErr(err)
	defer db.Close()

	var statement *sql.Stmt
	statement, err = db.Prepare("UPDATE dc.victual SET description = $1, brand = $2, source = $3, energyCal = $4, energyJoule = $5, fat = $6, saturatedFat = $7, carbohydrates = $8, sugars = $9, protein = $10, salt = $11, fiber = $12, barCode = $13, weightVolumeRatio = $14 WHERE ID = $1")
	checkErr(err)

	var result sql.Result
	result, err = statement.Exec(victual.ID,
		victual.Description,
		victual.Brand,
		victual.Source,
		victual.EnergyCal,
		victual.EnergyJoule,
		victual.Fat,
		victual.SaturatedFat,
		victual.Carbohydrates,
		victual.Sugars,
		victual.Protein,
		victual.Salt,
		victual.Fiber,
		victual.BarCode,
		victual.WeightVolumeRatio)
	checkErr(err)
	var rowsAffected int64
	rowsAffected, err = result.RowsAffected()
	checkErr(err)
	statement.Close()
	if rowsAffected == 1 {
		return victual
	}
	return nil
}

func check_result(result sql.Result) {
	rows, err := result.RowsAffected()
	check_error(err)
	if rows == 0 {
		fmt.Printf("No rows affected by query")
	}
}

func (database *Database) CreateTables(tableConf *TableConf) {
	db, err := sql.Open(database.Driver, database.dataSource)
	if err != nil {
		panic(err)
	}
	var result sql.Result

	var auto_increment_syntax = "INT AUTO INCREMENT "
	if database.IsPostgres() {
		auto_increment_syntax = "SERIAL "
	}
	fmt.Printf("creating table '%s'... \n", tableConf.Name)
	query := fmt.Sprintf("CREATE TABLE IF NOT EXISTS %s (id %s PRIMARY KEY, %s varchar(255), %s varchar(255), created_at timestamp DEFAULT CURRENT_TIMESTAMP, updated_at timestamp DEFAULT CURRENT_TIMESTAMP)", tableConf.Name, auto_increment_syntax, tableConf.Hash, tableConf.Url)
	result, err = db.Exec(query)
	if err != nil {
		panic(err)
	}
	result.RowsAffected()

	fmt.Printf("creating table 'goahead_statistics'... \n")
	query = fmt.Sprintf("CREATE TABLE IF NOT EXISTS goahead_statistics (id %s PRIMARY KEY, created_at timestamp DEFAULT CURRENT_TIMESTAMP)", auto_increment_syntax)
	result, err = db.Exec(query)
	if err != nil {
		panic(err)
	}
	result.RowsAffected()
}

func (d *DBAlias) BatchExec(sqlbuf string, argsv [][]interface{}) (affectedRows int64, err error) {
	var result sql.Result
	if argsv == nil || len(argsv) == 0 {
		result, err = d.db.Exec(sqlbuf)
		if err == nil {
			affectedRows, err = result.RowsAffected()
		}
		return
	} else {
		var stmt *sql.Stmt
		stmt, err = d.db.Prepare(sqlbuf)
		if err != nil {
			return
		}

		defer stmt.Close()
		affectedRows = 0
		for i, _ := range argsv {
			r, err1 := stmt.Exec(argsv[i]...)
			if err1 != nil {
				err = err1
				return
			}
			num, _ := r.RowsAffected()
			affectedRows += num
		}

	}

	return

}

func (this *tableMap) Update2(exec SQLExecutor, where string, data map[string]string, except []string) (rows int64, err error) {
	dialect := this.dbmap.dialect
	updSQL := dialect.UpdateSQL(this.schemaName, this.tableName)
	//
	L := len(data)
	setFields := make([]string, L)
	quote := ""
	noQuotes := array2dict(except)
	var i int
	for key, val := range data {
		if _, ok := noQuotes[key]; ok {
			quote = ""
		} else {
			quote = "'"
		}
		setFields[i] = fmt.Sprintf("%s = %s%s%s", dialect.QuoteField(key), quote, val, quote)
		i++
	}
	//
	query := fmt.Sprintf(updSQL, strings.Join(setFields, ", "), setWhere(where))
	if exec == nil {
		exec = this
	}
	var res sql.Result
	if res, err = exec.Exec(query); err == nil {
		rows, err = res.RowsAffected()
	}
	return
}

func (this *tableMap) update(vptr reflect.Value, exec SQLExecutor, execVal []reflect.Value) (rows int64, err error) {
	var (
		bind *bindObj
		res  sql.Result
	)
	if err = triggerRun("PreUpdate", vptr, execVal); err != nil {
		return
	}
	if bind, err = this.bindUpdate(); err != nil {
		return
	}
	if err = bind.bindArgs(vptr.Elem()); err != nil {
		return
	}
	if res, err = exec.Exec(bind.query, bind.argValues...); err != nil {
		return
	}
	if rows, err = res.RowsAffected(); err != nil {
		return
	}
	if err = triggerRun("PostUpdate", vptr, execVal); err != nil {
		return
	}
	return
}

func (m *Mysql) Exec(query string, param ...interface{}) (rowsAffected int64, lastInsertId int64) {
	if !m.IsOpen() {
		panic(errors.New("[mysql555]It is not connected to the host"))
	}

	var res sql.Result = nil
	var err error = nil

	if m.IsTransaction() {
		res, err = m.tx.Exec(query, param...)
	} else {
		res, err = m.db.Exec(query, param...)
	}

	if err != nil {
		message := err.Error()
		message = message + "\n" + "[ SQL ] " + query + "\n" + fmt.Sprintf("[ PRM ] %#v\n", param)
		panic(errors.New(message))
	}

	lastInsertId, err = res.LastInsertId()
	if err != nil {
		panic(err)
	}
	rowsAffected, err = res.RowsAffected()
	if err != nil {
		panic(err)
	}

	return
}

func fieldMetricTagPut(r *http.Request, h http.Header, b *bytes.Buffer) *weft.Result {
	v := r.URL.Query()

	var err error
	var result sql.Result

	if result, err = db.Exec(`INSERT INTO field.metric_tag(devicePK, typePK, tagPK)
				SELECT devicePK, typePK, tagPK
				FROM field.device, field.type, mtr.tag
				WHERE deviceID = $1
				AND typeID = $2
				AND tag = $3`,
		v.Get("deviceID"), v.Get("typeID"), v.Get("tag")); err != nil {
		if err, ok := err.(*pq.Error); ok && err.Code == errorUniqueViolation {
			// ignore unique constraint errors
			return &weft.StatusOK
		} else {
			return weft.InternalServerError(err)
		}
	}

	var i int64
	if i, err = result.RowsAffected(); err != nil {
		return weft.InternalServerError(err)
	}
	if i != 1 {
		return weft.BadRequest("Didn't create row, check your query parameters exist")
	}

	return &weft.StatusOK
}

/*
	設置任務狀態
*/
func (this *TaskDao) SetTasksStatus(tasks []types.CrawlTask, status TaskStatus) (int64, error) {
	nTasks := len(tasks)
	var affectedRows int64 = 0
	var err = ErrNoTasks
	if nTasks > 0 {
		taskIds := []int32{}
		var result sql.Result
		var args []interface{}
		var sqlStr string
		var now = time.Now()

		for _, task := range tasks {
			taskIds = append(taskIds, task.Id)
		}

		if status == TASK_FINISH {
			sqlStr = fmt.Sprintf("update %s set status=%d, last_crawl_time=%d, crawl_times=crawl_times+1, update_time='%s' where id in (?)", TaskTable, status, now.Unix(), now.Format("2006-01-02 15:04:05"))
		} else {
			sqlStr = fmt.Sprintf("update %s set status=%d, update_time='%s' where id in (?)", TaskTable, status, now.Format("2006-01-02 15:04:05"))
		}

		sqlStr, args, err = sqlx.In(sqlStr, taskIds)
		if err != nil {
			log.Errorln("build sql to set task status failed! sql is ", sqlStr)
		} else {
			result, err = this.db.Exec(sqlStr, args...)
			if err != nil {
				log.Errorln("update tasks status error: ", err)
			}

		}
		affectedRows, _ = result.RowsAffected()
	}
	return affectedRows, err
}

// ChangeUserPassword ...
func ChangeUserPassword(u models.User, oldPassword ...string) (err error) {
	if len(oldPassword) > 1 {
		return errors.New("Wrong numbers of params.")
	}

	o := GetOrmer()

	var r sql.Result
	if len(oldPassword) == 0 {
		//In some cases, it may no need to check old password, just as Linux change password policies.
		r, err = o.Raw(`update user set password=?, salt=? where user_id=?`, utils.Encrypt(u.Password, u.Salt), u.Salt, u.UserID).Exec()
	} else {
		r, err = o.Raw(`update user set password=?, salt=? where user_id=? and password = ?`, utils.Encrypt(u.Password, u.Salt), u.Salt, u.UserID, utils.Encrypt(oldPassword[0], u.Salt)).Exec()
	}

	if err != nil {
		return err
	}
	c, err := r.RowsAffected()
	if err != nil {
		return err
	}
	if c == 0 {
		return errors.New("No record has been modified, change password failed.")
	}

	return nil
}

func (p *TxScope) getAffectedRows(r sql.Result) int64 {
	if count, err := r.RowsAffected(); err != nil {
		panic(err)
	} else {
		return count
	}
}