mysql5.0,存储过程学习中...

dragon76

原来一直用mysql4.0,不过近日down了5.0的For windows试用,想学习一下新特性,主要是存储过程,不过很惭愧至今未成功
      不知,是否有兄弟也在试用且成功的,希望能交流一下

雪中凌花

mysql 5.0支持存储过程了吗？

dragon76

它的文档说这是5.0支持的新特性,而且在它的文档中也确实有这方面的说明,只是我的E文不太好一知半解的试了一段时间后以失败而告终!

雪中凌花

我先去看看，

czw1413_cn

没听说MYSQL支持SP
只见过一本书上专门说，不支持SP

henryzhou

根据mysql  reference manual上写，5.0是支持Stored Procedures的

dragon76

5.0的确已经支持存储过程了
在MySQL前几版的的开发计划中也有如此的说明,5.0将支持存储过程以及视图功能

dragon76

今天找到了一个好贴,已经可以解决上面的问题了,和兄弟们一起分享一下
[以下内容转自 程序员大本营 2004-02-02]
Peeking in MySQL5.0 alpha Enterprise Functional<Function & Procedure>;

程序员大本营 2004-02-02


MySQL5.0 Alpha 發佈, 我們期待已久的 Create Function 和 Create Procedure 的功能終於有了. 詳細的資訊請參考 MySQL AB 的官方網站的 新聞. 早就想要的功能,出來了還不趕快試試....

本文以 Windows XP PRO os 為例< 我可不是有意來替 M$ 宣傳,只是我用的是 Windows,沒有辦法啦>;來說明,其它OS 類同, 先下載 MySQL5.0, 為了免除安裝,我們直接下載 Without installer (unzip in C:\) 的版本,到 http://www.mysql.com/downloads/mysql-5.0.html 下載.

1. 直接 unzip 後把其放到 C:\ 下, 並把 root Directory 改為 mysql(不改也可,那在 my.ini 中要把其中的 mysql 改為你的實際名稱)

2. 下面是 my.ini 的配置文件,如果你對配置不熟的話,你可以直接 Copy 過去存為 my.ini 後放到 C:\windows 下即可 (我電腦的 RAM = 256)
========================================================================================================
# Example mysql config file.
# Copy this file to c:\my.cnf to set global options
#
# One can use all long options that the program supports.
# Run the program with --help to get a list of available options

# This will be passed to all mysql clients
[client]
#password=my_password
port=3306
#socket=MySQL

# Here is entries for some specific programs
# The following values assume you have at least 32M ram

# The MySQL server
[mysqld]
port=3306
#socket=MySQL
skip-locking
set-variable = key_buffer=16M
set-variable = max_allowed_packet=1M
set-variable = table_cache=64
set-variable = sort_buffer=512K
set-variable = net_buffer_length=8K
set-variable = myisam_sort_buffer_size=8M
server-id = 1

# Uncomment the following if you want to log updates
#log-bin

# Uncomment the following rows if you move the MySQL distribution to another
# location
#basedir = d:/mysql/
#datadir = d:/mysql/data/


# Uncomment the following if you are NOT using BDB tables
#skip-bdb

# Uncomment the following if you are using BDB tables
#set-variable = bdb_cache_size=4M
#set-variable = bdb_max_lock=10000

# Uncomment the following if you are using Innobase tables
innodb_data_file_path = ibdata1:400M
innodb_data_home_dir = C:/mysql/InnoDB/ibdata # InnoDB 及 ibdata 的資料夾你要自己動手
innodb_log_group_home_dir = C:/mysql/InnoDB/iblogs # iblogs 的資料夾同樣你要自己動手
innodb_log_arch_dir = C:/mysql/innodb/iblogs
set-variable = innodb_mirrored_log_groups=1
set-variable = innodb_log_files_in_group=3
set-variable = innodb_log_file_size=5M
set-variable = innodb_log_buffer_size=8M
innodb_flush_log_at_trx_commit=1
innodb_log_archive=0
set-variable = innodb_buffer_pool_size=16M
set-variable = innodb_additional_mem_pool_size=2M
set-variable = innodb_file_io_threads=4
set-variable = innodb_lock_wait_timeout=50

[mysqldump]
quick
set-variable = max_allowed_packet=16M

[mysql]
no-auto-rehash
# Remove the next comment character if you are not familiar with SQL
#safe-updates

[isamchk]
set-variable = key_buffer=20M
set-variable = sort_buffer=20M
set-variable = read_buffer=2M
set-variable = write_buffer=2M

[myisamchk]
set-variable = key_buffer=20M
set-variable = sort_buffer=20M
set-variable = read_buffer=2M
set-variable = write_buffer=2M

[mysqlhotcopy]
interactive-timeout
[WinMySQLAdmin]
Server=C:/mysql/bin/mysqld-nt.exe
============================================================================

3. Create InnoDB table table space 如果運行沒有問題,你應該可以看到如下內容:
==========================================================

C:\mysql\bin>;mysqld --console
InnoDB: The first specified data file C:\mysql\InnoDB\ibdata\ibdata1 did not exist:
InnoDB: a new database to be created!
040113 15:12:54 InnoDB: Setting file C:\mysql\InnoDB\ibdata\ibdata1 size to 400 MB
InnoDB: Database physically writes the file full: wait...
InnoDB: Progress in MB: 100 200 300 400
040113 15:13:19 InnoDB: Log file C:\mysql\InnoDB\iblogs\ib_logfile0 did not exist: new to be created
InnoDB: Setting log file C:\mysql\InnoDB\iblogs\ib_logfile0 size to 5 MB
InnoDB: Database physically writes the file full: wait...
040113 15:13:19 InnoDB: Log file C:\mysql\InnoDB\iblogs\ib_logfile1 did not exist: new to be created
InnoDB: Setting log file C:\mysql\InnoDB\iblogs\ib_logfile1 size to 5 MB
InnoDB: Database physically writes the file full: wait...
040113 15:13:20 InnoDB: Log file C:\mysql\InnoDB\iblogs\ib_logfile2 did not exist: new to be created
InnoDB: Setting log file C:\mysql\InnoDB\iblogs\ib_logfile2 size to 5 MB
InnoDB: Database physically writes the file full: wait...
InnoDB: Doublewrite buffer not found: creating new
InnoDB: Doublewrite buffer created
InnoDB: Creating foreign key constraint system tables
InnoDB: Foreign key constraint system tables created
040113 15:13:26 InnoDB: Started; log sequence number 0 0
mysqld: ready for connections.
Version: '5.0.0-alpha-max-debug' socket: '' port: 3306
==========================================================

安裝 Ok, 進去看看吧,沒想到一進 Mysql 馬上就來了個下馬威, 原來的 '' 這個 user 不能用 mysql 的 databases
=========================================================
C:\mysql\bin>;mysql
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2 to server version: 5.0.0-alpha-max-debug

Type 'help;' or '\h' for help. Type '\c' to clear the buffer.

mysql>; use mysql
ERROR 1044 (42000): Access denied for user: ''@'localhost' to database 'mysql
==========================================================

沒有辦法,只有用 root 進去:

==========================================================

C:\mysql\bin>;mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 5 to server version: 5.0.0-alpha-max-debug

Type 'help;' or '\h' for help. Type '\c' to clear the buffer.

mysql>;

==========================================================

root 的密碼還是勤快一點把它改掉吧


4. 體驗一下 Create Function 吧

CREATE FUNCTION MyFunc (s CHAR(20)) RETURNS CHAR(50) RETURN CONCAT('Hello ',s,' DLL',' !');

==========================================================
mysql>; CREATE FUNCTION MyFunc (s CHAR(20)) RETURNS CHAR(50) RETURN CONCAT('Hello
',s,'.Lan',' !');
Query OK, 0 rows affected (0.00 sec)

mysql>;

mysql>; select MyFunc('Dennis');
+--------------------+
| MyFunc('Dennis') |
+--------------------+
| Hello Dennis.Lan ! |
+--------------------+
1 row in set (0.01 sec)

mysql>;

==========================================================
5. Drop Function

==========================================================
mysql>; drop function MyFunc;
Query OK, 0 rows affected (0.00 sec)

mysql>;

==========================================================

6. Create 一個 Procedure 試試吧!

CREATE PROCEDURE MyProc (OUT param1 INT) BEGIN SELECT COUNT(*) INTO param1 FROM sys_forms; END;

千萬記住,下面這樣子不行喲, 我試了 n 次, 每次都是錯誤, 我還以為 Mysql 有問題呢,原來不是

==========================================================

mysql>; use test;
Database changed
mysql>; CREATE PROCEDURE MyProc (OUT param1 INT) BEGIN SELECT COUNT(*) INTO param
1 FROM sys_forms; END;

ERROR 1064 (42000): You have an error in your SQL syntax. Check the manual that
corresponds to your MySQL server version for the right syntax to use near 'SELE
CT COUNT(*) INTO param1 FROM sys_forms' at line 1

==========================================================

正確的做法是:
==========================================================
mysql>; delimiter | # 因為你的 Procedure 或 Function中難免會用到 ";" 作為 sql statement 的結束符, 所以還是請你把這個結束符號改一下吧,不然就會出現上面的 error 1064(42000)


mysql>; CREATE PROCEDURE MyProc (OUT param1 INT) BEGIN SELECT COUNT(*) INTO param1 FROM mysql.user; END;
->; |
Query OK, 0 rows affected (0.00 sec)

==========================================================

OK, 你的成功了嗎?

強烈建議你先看看這個 http://www.mysql.com/doc/en/CREATE_PROCEDURE.html

Procedure Create 成功了,測試一下吧!
Step 1:
==========================================================

mysql>; CALL MyProc(@a)|
Query OK, 0 rows affected (0.01 sec)
==========================================================

Step 2:
==========================================================

mysql>; select @a;
->; |
+------+
| @a |
+------+
| 0 |
+------+
1 row in set (0.00 sec)

mysql>;

==========================================================

來個完整的:

==========================================================

mysql>; CREATE PROCEDURE MyProc (OUT param1 INT) BEGIN SELECT COUNT(*) INTO param
1 FROM mysql.user; END;
->; |
Query OK, 0 rows affected (0.00 sec)

mysql>; call MyProc(@a)|
Query OK, 0 rows affected (0.03 sec)

mysql>; select @a |
+------+
| @a |
+------+
| 4 |
+------+
1 row in set (0.00 sec)

==========================================================

7. Drop Procedures:
這樣子做怎麼又不對呀?

==========================================================

mysql>; drop procedure myproc;
->; |
ERROR 1289 (42000): PROCEDURE myproc does not exist

==========================================================

原來 Windows 下的 MySQL 在 Procedure 的問題上又區分起輩份的大小了,下面這樣才對啊!

==========================================================

mysql>; drop procedure MyProc|
Query OK, 0 rows affected (0.00 sec)

==========================================================

注: 如果你在和應用程式連結的時候出現

Client does not support authentication protocol requested by server; consider upgrading MySQL client

請參考 http://www.mysql.com/doc/en/Old_client.html 這里提供了詳細的解決方案.

Enjoy it yourself!
Good Luck!

dragon76

或许你还会需要在MySQL库中建立proc这个表

CREATE TABLE proc (
  db                char(64) binary DEFAULT '' NOT NULL,
  name              char(64) binary DEFAULT '' NOT NULL,
  type              enum('FUNCTION','PROCEDURE') NOT NULL,
  specific_name     char(64) binary DEFAULT '' NOT NULL,
  language          enum('SQL') DEFAULT 'SQL' NOT NULL,
  sql_data_access   enum('CONTAINS_SQL') DEFAULT 'CONTAINS_SQL' NOT NULL,
  is_deterministic  enum('YES','NO') DEFAULT 'NO' NOT NULL,
  security_type     enum('INVOKER','DEFINER') DEFAULT 'DEFINER' NOT NULL,
  param_list        blob DEFAULT '' NOT NULL,
  returns           char(64) DEFAULT '' NOT NULL,
  body              blob DEFAULT '' NOT NULL,
  definer           char(77) binary DEFAULT '' NOT NULL,
  created           timestamp,
  modified          timestamp,
  sql_mode          set(
                        'REAL_AS_FLOAT',
                        'PIPES_AS_CONCAT',
                        'ANSI_QUOTES',
                        'IGNORE_SPACE',
                        'NOT_USED',
                        'ONLY_FULL_GROUP_BY',
                        'NO_UNSIGNED_SUBTRACTION',
                        'NO_DIR_IN_CREATE',
                        'POSTGRESQL',
                        'ORACLE',
                        'MSSQL',
                        'DB2',
                        'MAXDB',
                        'NO_KEY_OPTIONS',
                        'NO_TABLE_OPTIONS',
                        'NO_FIELD_OPTIONS',
                        'MYSQL323',
                        'MYSQL40',
                        'ANSI',
                        'NO_AUTO_VALUE_ON_ZERO'
                    ) DEFAULT 0 NOT NULL,
  comment           char(64) binary DEFAULT '' NOT NULL,
  PRIMARY KEY (db,name,type)
) comment='Stored Procedures';