ERROR 1396 (HY000): Operation CREATE USER failed for 'jack'@'localhost'

问题

I seem to be unable to re-create a simple user I\'ve deleted, even as root in MySQL.

My case: user \'jack\' existed before, but I deleted it from mysql.user in order to recreate it. I see no vestiges of this in that table. If I execute this command for some other, random username, say \'jimmy\', it works fine (just as it originally did for \'jack\').

What have I done to corrupt user \'jack\' and how can I undo that corruption in order to re-create \'jack\' as a valid user for this installation of MySQL?

See example below. (Of course, originally, there was much time between the creation of \'jack\' and his removal.)

mysql> CREATE USER \'jack\'@\'localhost\' IDENTIFIED BY \'test123\';
Query OK, 0 rows affected (0.00 sec)

mysql> select user,host from user;
+------------------+-----------------+
| user             | host            |
+------------------+-----------------+
| root             | 127.0.0.1       |
| debian-sys-maint | localhost       |
| jack             | localhost       |
| root             | localhost       |
| root             | russ-elite-book |
+------------------+-----------------+
5 rows in set (0.00 sec)

mysql> delete from user where user = \'jack\';
Query OK, 1 row affected (0.00 sec)

mysql> select user,host from user;
+------------------+-----------------+
| user             | host            |
+------------------+-----------------+
| root             | 127.0.0.1       |
| debian-sys-maint | localhost       |
| root             | localhost       |
| root             | russ-elite-book |
+------------------+-----------------+
4 rows in set (0.00 sec)

mysql> CREATE USER \'jack\'@\'localhost\' IDENTIFIED BY \'test123\';
ERROR 1396 (HY000): Operation CREATE USER failed for \'jack\'@\'localhost\'
mysql> CREATE USER \'jimmy\'@\'localhost\' IDENTIFIED BY \'test123\';
Query OK, 0 rows affected (0.00 sec)

mysql> select user,host from user;
+------------------+-----------------+
| user             | host            |
+------------------+-----------------+
| root             | 127.0.0.1       |
| debian-sys-maint | localhost       |
| jimmy            | localhost       |
| root             | localhost       |
| root             | russ-elite-book |
+------------------+-----------------+
5 rows in set (0.00 sec)

回答1:

Try doing a FLUSH PRIVILEGES. This MySQL bug post on that error code appears to report some success in a case similar to yours after flushing privs.

回答2:

yes this bug is there. However, I found a small workaround.

Assume the user is there, so drop the user
After deleting the user, there is need to flush the mysql privileges
Now create the user.

That should solve it. Assuming we want to create the user admin @ localhost, these would be the commands:

drop user admin@localhost;
flush privileges;
create user admin@localhost identified by 'admins_password'

Cheers

回答3:

This bug has been sitting on bugs.mysql.com since 2007 and this thread is mainly just a parroting of all those wrong answers even up to a year ago.

According to the MySQL documentation, commands like CREATE USER, GRANT, REVOKE, and DROP USER do not require a subsequent FLUSH PRIVILEGES command. It's quite clear why, if one reads the docs. It's because altering the MySQL tables directly does not reload the info into memory; yet the plethora of solutions to this bug claim that FLUSH PRIVILEGES is the answer.

This also may not even be a bug. It is a documentation conspiracy - docs vary in one critical place from version to version.

13.7.1.2. DROP USER Syntax

...

DROP USER user [, user] ...

...

DROP USER 'jeffrey'@'localhost';

If you specify only the user name part of the account name, a host name part of '%' is used.

DROP USER as present in MySQL 5.0.0 removes only accounts that have no privileges. In MySQL 5.0.2, it was modified to remove account privileges as well. This means that the procedure for removing an account depends on your version of MySQL.

As of MySQL 5.0.2, you can remove an account and its privileges as follows:

DROP USER user;

The statement removes privilege rows for the account from all grant tables.

The only time I get this error is when I do DROP USER user; like the doc suggests, but MySQL does not treat the '%' as a wildcard in a way that would drop all users at all hosts. It's not so wild after all. Or, it may be that it sometimes works when it deletes the localhost user and then tries to delete the one at %.

It's clear to me that when it tries to delete the user at %, it issues an error message and quits. Subsequent CREATE USER at localhost will fail because the localhost user was never deleted. There seems to be no need to waste time digging in the grant tables looking for ghosts as one poster suggested.

I see 7 votes for:

DROP USER 'jack@localhost'; // completely delete the account

Which is interpreted as DROP USER 'jack@localhost'@'%'; # wrong

There actually seems to be a real bug that generates the same error message, but it has to do with the first created user (after a new mysql server install) being dropped. Whether that bug has been fixed, I don't know; but I don't recall that happening lately and I'm up to ver 5.5.27 at this time.

回答4:

If you use a DELETE statement on the mysql.user table in an attempt to remove a user, then attempt to re-establish the user with CREATE USER, you will get a 1396 error. Get rid of this error by running DROP USER 'username'@'host';

DELETE 
  FROM mysql.user 
 WHERE user = 'jack';

(You will get 1396 errors if you attempt to re-create jack)

CREATE USER 'jack'@'localhost' IDENTIFIED BY PASSWORD '*Fi47ytFF3CD5B14E7EjkjkkC1D3F8086A5C0-krn';

(Get out of this situation by running DROP USER)

DROP USER 'jack'@'localhost';

(I suppose FLUSH PRIVILEGES can't hurt, but definitely drop the user first.)

回答5:

You shouldn't be manually deleting users that way. MySQL has REVOKE syntax for removing privileges and DROP USER for deleting them:

REVOKE priv1,priv2,priv3,etc... FROM 'jack@localhost'; // remove certain privileges
DROP USER 'jack@localhost'; // completely delete the account

Best to use the tools provided rather than mucking around in the background.

回答6:

Drop the user, flush the privileges; then, create the user. It does work!

回答7:

try delete from mysql.db where user = 'jack' and then create a user

回答8:

In MySQL 5.6 using Drop user userid; does not work. Use: Drop user 'userid'@'localhost'; and/or Drop user 'userid'@'%';. In this way I was able to drop the user and recreate it.

回答9:

two method 
one :
setp 1: drop user 'jack'@'localhost';
setp 2: create user 'jack'@localhost identified by 'ddd';

two:
setp 1: delete from user where user='jack'and host='localhost';
setp 2: flush privileges;
setp 3: create user 'jack'@'localhost' identified by 'ddd';

回答10:

If you want to delete a user with sql, you need to delete the related data in these tables: columns_priv, db, procs_priv, tables_priv. Then execute flush privileges;

回答11:

This post MySQL ERROR 1045 (28000): Access denied for user 'bill'@'localhost' (using password: YES) is useful. Sometimes, there is an anonymous user ''@'localhost' or ''@'127.0.0.1'. So, to solve the problem,

first drop the user whose 'create user' failed.
Create new user.
Grant required privileges to the new user.
Flush privileges.

回答12:

I had the same error. But command "FLUSH PRIVILEGES;" didn't help. I did like that:

CREATE USER 'jimmy'@'localhost' IDENTIFIED BY 'test123';
UPDATE mysql.user SET USER='jack' WHERE USER='jimmy';

回答13:

A simple work around on this issue. As "delete" command only removes the user record in "user" table of "mysql" database, we could add it back and then drop the user completely. Then you could create user with same name.

Step 1. find the record format of user table in mysql database

use mysql;
select * from user;

Step 2. According to the columns showed in step1, create a dummy record with the user name. Insert it into the table, for example, be reminded to replace the "username" with your username.

Insert into user value ('%','username','N','N','N','N','N',
'N','N','N','N','N','N','N','N','N','N','N','N','N','N','N',
'N','N','N','N','N','N','N','N','N','','','','','0','0','0',
'0','mysql_native_password',
'*52C5E3AC6BC5E2E0BFF86978BF62A1481AC79D58','N',
'2016-12-10 23:59:12',null,'N');

Note: sometimes you may encounter issues in inserting, just change the data to make it work.

Step 3. Drop the user.

drop user username;

Now you are able to create user with same name.

回答14:

Check if is

'user'@'%'

'user'@'localhost'

回答15:

Funnily enough the MySQL workbench solved it for me. In the Administration tab -> Users and Privileges, the user was listed with an error. Using the delete option solved the problem.

回答16:

The MySQL server is running with the --skip-grant-tables option so it cannot execute this statement

回答17:

I know this is old, but since it is the first result in Google I figured I should add my solution. In my case dropping the user worked fine, but recreating the user gave me a "ERROR 2013 (HY000): Lost connection to MySQL server during query" and "ERROR 2006 (HY000): MySQL server has gone away." I tried the flush privileges -> drop user solution, but still had the same error.

In my case the error was due to a mysql upgrade from 5.1 -> 5.6. Viewing the error logs, I noticed that it said to run mysql_upgrade. Did that and my create user statement worked fine!

回答18:

I recently got this error.

What worked for me is checking in the mysql workbench 'Users and Privileges' and realizing user still existed.

After deleting it from there, I was able to recreate the user.

回答19:

mysql> DELETE FROM mysql.db WHERE user = 'jack'

Restart the server:

# mysql.server restart

Then do your CREATE USER command.

回答20:

Just delete the user related data from mysql.db(maybe from other tables too), then recreate both.

回答21:

I had also faced the same issue, after few searches, I found a solution that worked for me.I hope it will help you. As you have already created users, now try to do a FLUSH PRIVILEGES on your Mysql console. This issue is already in MySql bug post.You can also check this one.Now after flushing, you can create a new user. follow below Steps:

Step-1: Open terminal Ctrl+Alt+T
Step-2: mysql -u root -p  , it will ask for your MySQL password.

Now you can able to see Mysql console.

Step-3: CREATE USER 'username'@'host' IDENTIFIED by 'PASSWORD';

Instead of username you can put username you want. If you are running Mysql on your local machine, then type "localhost" instead of the host, otherwise give your server name you want to access.

Ex: CREATE USER smruti@localhost IDENTIFIED by 'hello';

Now new user is created. If you want to give all access then type

GRANT ALL PRIVILEGES ON * . * TO 'newuser'@'localhost';

Now you can quit the MySQL by typing \q.Now once again login through

mysql -u newusername -p , then press Enter. You can see everything.

Hope this helps.

来源：https://stackoverflow.com/questions/5555328/error-1396-hy000-operation-create-user-failed-for-jacklocalhost

标签

mysql

mysql-management

ERROR 1396 (HY000): Operation CREATE USER failed for &#39;jack&#39;@&#39;localhost&#39;

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