Re: Using mySQL connectJ issue
hi it seems that the mysql-connector-java-3.0.8-stable-bin.jar file is not in the classpath. best regards benny - Original Message - From: Joe Yan [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Monday, September 29, 2003 7:58 PM Subject: Using mySQL connectJ issue Hi all, when I used JDBC driver (Connector/J3.0.8) to run my java database agent codes, It always have following errors: java.lang.classNotFoundException : com.mysql.jdbc.driver at java.net.URLClassloader$1.run(URLClassLoader.java:198) I set the Classpath to mysql-connector-java-3.0.8-stable-bin.jar and my url=jdbc:mysql://localhost:3306/test,, (test is my database name) using JDBC DriverManager and com.mysql.jdbc.driver to load the driver: class.forName(com.mysql.jdbc.driver).newInstance(); I have no clue what's going on, I appriciate if anyone can give soem advices!Thx. Joe _ Add photos to your e-mail with MSN 8. Get 2 months FREE*. http://join.msn.com/?page=features/featuredemail -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED] -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Re: Data store/extract help almost there ,still error's
hi you mix the password and key, use AES_ENCRYPT(the clear password, the key to crypt); AES_DECRYPT(the crypted password, the key to crypt); example UPDATE user_profile SET username=james , password=AES_ENCRYPT(bond007, sydo89) WHERE personid=1; saves the password in the record with the id = 1 SELECT username, AES_DECRYPT(password,sydo89) AS psw FROM user_profile WHERE personid=1 retrieves the username and the clear password regards benny - Original Message - From: Stout, Jeff [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Saturday, September 20, 2003 4:09 PM Subject: RE: Data store/extract help almost there ,still error's Thanks John, I'm trying various syntax changes but still getting Empty set mysql INSERT INTO user_profile (userid,password) - VALUES (James,AES_ENCRYPT(bond,007)); Query OK, 1 row affected (0.00 sec) mysql SELECT * FROM user_profile WHERE userid=james AND - AES_DECRYPT(password,bond)=007; Empty set (0.00 sec) -Original Message- From: John Hopkins [mailto:[EMAIL PROTECTED] Sent: Friday, September 19, 2003 6:38 PM To: Stout, Jeff Subject: RE: Data store/extract help almost there I've been following with interest. As I understand the previous messages, you are indeed almost there Try this: mysql INSERT INTO user_profile (userid,password) - VALUES (joeblow,AES_ENCRYPT(spit,swallow)); Query OK, 1 row affected (0.01 sec) mysql SELECT * FROM user_profile WHERE userid=joeblow AND - AES_DECRYPT(password,swallow)=spit; I don't have MySQL running anywhere right now, can't test it. The point is you need to decrypt what's in *password*, and compare that to the unencrypted password (entered by the user?). Hope this helps, John Hopkins Hopkins IT -Original Message- From: Stout, Jeff [mailto:[EMAIL PROTECTED] Sent: Friday, September 19, 2003 4:31 PM To: PF: MySQL; [EMAIL PROTECTED] Subject: RE: Data store/extract help almost there Almost there, here is the error mysql INSERT INTO user_profile (userid,password) - VALUES (joeblow,AES_ENCRYPT(spit,swallow)); Query OK, 1 row affected (0.01 sec) mysql SELECT * FROM user_profile WHERE userid=joeblow AND - password=AES_DECRYPT(spit,swallow); Empty set (0.01 sec) -Original Message- From: PF: MySQL [mailto:[EMAIL PROTECTED] Sent: Friday, September 19, 2003 4:48 PM To: [EMAIL PROTECTED] Subject: RE: Data store/extract help !! Woops, Sorry, Phone call distracted me AES_ENCRYPT(string,key_string) AES_DECRYPT(string,key_string) These functions allow encryption/decryption of data using the official AES (Advanced Encryption Standard) algorithm, previously known as Rijndael. Encoding with a 128-bit key length is used, but you can extend it up to 256 bits by modifying the source. We chose 128 bits because it is much faster and it is usually secure enough. The input arguments may be any length. If either argument is NULL, the result of this function is also NULL. As AES is a block-level algorithm, padding is used to encode uneven length strings and so the result string length may be calculated as 16*(trunc(string_length/16)+1). If AES_DECRYPT() detects invalid data or incorrect padding, it returns NULL. However, it is possible for AES_DECRYPT() to return a non-NULL value (possibly garbage) if the input data or the key are invalid. You can use the AES functions to store data in an encrypted form by modifying your queries: INSERT INTO t VALUES (1,AES_ENCRYPT(text,password)); You can get even more security by not transferring the key over the connection for each query, which can be accomplished by storing it in a server side variable at connection time: SELECT @password:=my password; INSERT INTO t VALUES (1,AES_ENCRYPT(text,@password)); AES_ENCRYPT() and AES_DECRYPT() were added in version 4.0.2, and can be considered the most cryptographically secure encryption functions currently available in MySQL. -Kevin -- MySQL Windows Mailing List For list archives: http://lists.mysql.com/win32 To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED] -- MySQL Windows Mailing List For list archives: http://lists.mysql.com/win32 To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED] -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED] -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Re: Select statement with a field name that is a number?
hi use ` instead of ' may solve the problem. regards benny - Original Message - From: Zach [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Wednesday, August 06, 2003 7:04 PM Subject: Select statement with a field name that is a number? I'm trying to use a select statement for a table that uses numbers for the field names. Here is the query I've been trying. Please help! SELECT * FROM table_name WHERE '18'=1; (18 is the field name, 1 obviously is the value I'm looking for.) Everytime I have tried a variation, I get the same result where MySQL keeps evaluating the WHERE statement like a mathematical equation. -Zach -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
i need help, innodb blocks insertion into table for a while
hi dear mysql list members
i have setup a mysql database 4.013 with innodb enabled. when i set the transaction
isolation level to serializable. after executing a specific query is the insertion
into a table blocked for about 20 seconds. the table is defined as follows
CREATE TABLE `slide`
(
`id` bigint(20) unsigned NOT NULL auto_increment,
`identifier` varchar(255) NOT NULL default '',
`comment` varchar(255) default NULL,
`fromid` bigint(20) unsigned NOT NULL default '0',
`system` tinyint(1) unsigned NOT NULL default '0',
`size` int(10) unsigned NOT NULL default '0',
`data` text NOT NULL,
`modifyid` bigint(20) unsigned NOT NULL default '0',
`modifytime` bigint(20) unsigned NOT NULL default '0',
PRIMARY KEY (`id`)
) TYPE=InnoDB
executing the following query seems to work well. it returns quickly and the result is
as expected.
SELECT `id`, `data` FROM `slide` WHERE LOCATE('filterid=7',`data`) != 0
but the first insertion into the slide table after that select is locked for about 20
seconds. selects work without any timeout. i would be happy if someone has an idea how
i can resolve the problem.
best regards
benny
RE: i need help, innodb blocks insertion into table for a while
hi i solved the problem by executing the commit after the select. best regards benny
compare longblob with binary data
hi all a question about checking the data of a longblob for equality. assume the `data` field is of type longblob. the following statement returns the image records with equal data. SELECT * FROM `image` WHERE `data`=? how does mysql performe the test. does it check the length of the blob before comparing the data, or makes it sense to add the length test as follows SELECT * FROM `image` WHERE LENGTH(`data`) = ? AND `data`=? any suggestions? best regard benny
recursive sql statement
hi i searched the mysql doc for support of recursive sql statements, but found nothing. i am right that mysql does not support such kind of statements? best regards benny
Re: recursive sql statement
for me a recursive sql statement is when the result of a query can be used for a following query. the statement has start and stop condition. such kind of queries is useful for tree traversal. sql is based on relational algebra that does not allow to write such expressions. but as mentioned by rudy metzger some databases defines extensions to sql, oracle uses connect by. db2 has another apporach using with. best regards benny
Re: recursive sql statement
hi victoria sorry for this mysql newbie question, but what means planned for the near future? ist this weeks, months or years away? best regards benny
RE: RESETTING AUTO_INCREMENT
hi mike you suggested the following If you are referring to recovering some auto_increment values that were previously used by no rows now use them, it is better to avoid this. how can you prevent this? best regards benny
innodb transaction
hi all i started working with the innodb databasel. after reading the manual i am not sure how i shall use transctions. say i have the following case: SELECT read some row UPDATE depending on the select COMMIT to make the command sequence safe, the select has to lock the table. it would be nice to have something like: START TRANSACTION SELECT read some row UPDATE depending on the select COMMIT any row accessed between START TRANSACTION and COMMIT automatically locks the rows. but the manual does not exactly describe the behavior of the commands START TRANSACTION, BEGIN etc. It only denotes that it servers for ad-hoc transactions. i know that i can use the LOCK IN SHARE MODE with the SELECT command, but is this the only way? best regards benny
Re: innodb transaction
hi many thanks for that quick and precise answer - a big smile. i am very impressed by this user group, especially regarding the speed and quality of the answers. regards benny -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Re: AUTO_INCREMENT
hi you can reset the counter yourself with the following sql statement ALTER TABLE tbl_name AUTO_INCREMENT = 1; best regards benny - Original Message - From: Dylan Pham [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Tuesday, June 03, 2003 7:27 PM Subject: AUTO_INCREMENT Hi, I am new and am wodering if anyone can point out how to make AUTO_INCREMENT readjust the numbers so that when you delete a row it will go back to using the next number after the last row in the table? Thank you. Hai __ Do you Yahoo!? Yahoo! Calendar - Free online calendar with sync to Outlook(TM). http://calendar.yahoo.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED] -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
