我正在编写一个 MySQL 存储过程，它将选择一行，替换一些列值，然后更新该行。我的问题是 SELECT 语句没有获取所有值。也就是说，在 CLI 中具有值的列在我的存储过程中显示为 NULL。这是我的表定义：
Field | Type | Null | Key | Default | Extra |
id | int(11) | NO | PRI | NULL | auto_increment |
mac | varchar(32) | YES | UNI | NULL
ip | varchar(16) | YES | | NULL
type | varchar(16) | YES | | NULL
location_id | int(11) | YES | | NULL
name | varchar(64) | YES | | NULL
manufacturer | varchar(64) | YES | | NULL
model | varchar(64) | YES | | NULL
serial_number | varchar(64) | YES | | NULL
owner | int(11) | YES | | NULL
assigned_to | int(11) | YES | | NULL
contact | int(11) | YES | | NULL
admin | int(11) | YES | | NULL
status | int(11) | YES | | NULL
authorized | tinyint(1) | NO | | 0
authorized_by | int(11) | YES | | NULL
date_authorized | datetime | YES | | NULL
date_first_seen | datetime | YES | | NULL
date_last_seen | datetime | YES | | NULL
impact | smallint(6) | YES | | NULL
os_id | int(11) | YES | | NULL
updated_at | timestamp | NO | | CURRENT_TIMESTAMP | on update CURRENT_TIMESTAMP
org_unit_id | int(11) | NO | | NULL
is_virtual | tinyint(1) | NO | | 0
notes | text | YES | | NULL
这是我的代码的一部分：
CREATE PROCEDURE `updatehw`(mac varchar(32), ipaddr varchar(16), typ varchar(16),
loc int, name varchar(64), maker varchar(64),
model varchar(64), ser_no varchar(64), owner int,
assignee int, contact int, admin int, status int,
authorized tinyint, authorizer int, auth_date datetime,
impact smallint, os_id int, org int, virtual tinyint,
seen tinyint, notes text,
OUT error int, OUT error_text varchar(64))
MODIFIES SQL DATA
proc_label: BEGIN
Declare rc INT;
Declare hw_mac varchar(32);
Declare hw_ip varchar(16);
Declare hw_type varchar(16);
Declare hw_location_id INT;
Declare hw_name varchar(64);
Declare hw_manufacturer varchar(64);
Declare hw_model varchar(64);
Declare hw_serial_number varchar(64);
Declare hw_owner INT;
Declare hw_assigned_to INT;
Declare hw_contact INT;
Declare hw_admin INT;
Declare hw_status INT;
Declare hw_authorized tinyint;
Declare hw_authorized_by INT;
Declare hw_date_authorized, l_date_authorized DATETIME;
Declare hw_date_first_seen DATETIME;
Declare hw_date_last_seen DATETIME;
Declare hw_impact smallint;
Declare hw_os_id INT;
Declare hw_updated_at timestamp;
Declare hw_org_unit_id INT;
Declare hw_is_virtual tinyint;
Declare hw_notes text;
Declare Exit Handler for SQLEXCEPTION
BEGIN
ROLLBACK;
Set error = -99;
Set error_text = 'SQL Exception detected';
End;
Set error = 0;
Set error_text = NULL;
insert into log (msg) values ("updateHW starting"); -- DEBUG
Start Transaction;
-- See if the row exists and lock it
insert into log (msg) values (concat_ws('=','ipaddr',ipaddr)); -- DEBUG
Select mac, ip, type, location_id, name, manufacturer,
model, serial_number, owner, assigned_to, contact,
admin, status, authorized, authorized_by,
date_authorized, date_first_seen, date_last_seen,
impact, os_id, org_unit_id, is_virtual, notes
into hw_mac, hw_ip, hw_type, hw_location_id, hw_name, hw_manufacturer,
hw_model, hw_serial_number, hw_owner, hw_assigned_to, hw_contact,
hw_admin, hw_status, hw_authorized, hw_authorized_by,
hw_date_authorized, hw_date_first_seen, hw_date_last_seen,
hw_impact, hw_os_id, hw_org_unit_id, hw_is_virtual, hw_notes
from hardware where ip=ipaddr
lock in share mode;
insert into log (msg) values (concat_ws(' ',"hw_owner after select is",hw_owner)); -- DEBUG
insert into log (msg) values (concat_ws(' ',"hw_authorized_by after select is",hw_authorized_by)); -- DEBUG
insert into log (msg) values (concat_ws(' ',"hw_authorized after select is",hex(hw_authorized))); -- DEBUG
insert into log (msg) values (concat_ws(' ',"hw_is_virtual after select is",hex(hw_is_virtual))); -- DEBUG
Select found_rows() into rc;
If rc = 0 THEN
set error = -11;
set error_text = 'Entry not found';
ROLLBACK;
Leave proc_label;
End if;
.
.
.
CLI 说这是我的行的内容（我正在使用占位符值）：
id: 22
mac: mac
ip: ip
type: type2
location_id: 1
name: name
manufacturer: maker
model: model
serial_number: serial
owner: 1
assigned_to: 1
contact: 1
admin: 1
status: 1
authorized: 0
authorized_by: 1
date_authorized: 2013-03-20 08:46:16
date_first_seen: 2013-03-20 09:04:39
date_last_seen: NULL
impact: 0
os_id: NULL
updated_at: 2013-03-25 09:56:04
org_unit_id: 1
is_virtual: 1
notes: Another note
我的日志显示列 hw_authorized 和 hw_owner 被读取为 NULL 而不是实际值。
| 2013-03-25 13:12:23 | NULL | updateHW starting |
| 2013-03-25 13:12:23 | NULL | ipaddr=ip |
| 2013-03-25 13:12:23 | NULL | hw_owner after select is |
| 2013-03-25 13:12:23 | NULL | hw_authorized_by after select is 1 |
| 2013-03-25 13:12:23 | NULL | hw_authorized after select is |
| 2013-03-25 13:12:23 | NULL | hw_is_virtual after select is 1 |
这是我的表的创建方式：
CREATE TABLE hardware (
id int(11) NOT NULL AUTO_INCREMENT,
mac varchar(32) DEFAULT NULL,
ip varchar(16) DEFAULT NULL,
type varchar(16) DEFAULT NULL,
location_id int(11) DEFAULT NULL,
name varchar(64) DEFAULT NULL,
manufacturer varchar(64) DEFAULT NULL,
model varchar(64) DEFAULT NULL,
serial_number varchar(64) DEFAULT NULL,
owner int(11) DEFAULT NULL,
assigned_to int(11) DEFAULT NULL,
contact int(11) DEFAULT NULL,
admin int(11) DEFAULT NULL,
status int(11) DEFAULT NULL,
authorized tinyint(1) NOT NULL DEFAULT 0,
authorized_by int(11) DEFAULT NULL,
date_authorized datetime DEFAULT NULL,
date_first_seen datetime DEFAULT NULL,
date_last_seen datetime DEFAULT NULL,
impact smallint(6) DEFAULT NULL,
os_id int(11) DEFAULT NULL,
updated_at timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
org_unit_id int(11) NOT NULL,
is_virtual tinyint(1) NOT NULL DEFAULT 0,
notes text,
PRIMARY KEY (id),
UNIQUE KEY hardware_idx (mac)
) ENGINE=InnoDB AUTO_INCREMENT=23 DEFAULT CHARSET=latin1
和一个示例插入：
Insert into hardware (mac, ip, type, location_id, name, manufacturer,
model, serial_number, owner, assigned_to, contact,
admin, status, authorized, authorized_by,
date_authorized, date_first_seen,
date_last_seen, impact, os_id, org_unit_id,
is_virtual, notes)
values ('mac','ip','type',1,'name','maker','model','serial',
1,1,1,1, 1, 0,
1, current_timestamp(), current_timestamp(), current_timestamp(),
0, NULL, 1, 1, "Test");
我究竟做错了什么？
我在 CentOS 6.4 上使用 MySql 5.1。