Mysql – All users are having NO Privileges in phpMyAdmin

ddlMySQLwindows

By mistake, I changed all the privileges of user 'root' in my MySQL Database. Not even a single privilege is having for that user. Now if I log in with another user I am able to access only one database. But I have nearly 25 databases created with 'root' user. If I want to access all other databases I need to GRANT Privileges for the root user again but all other users are not permitted to execute GRANT statement. So is there any way to grant permissions for the root user again. The all other Databases contained in my DB Server are very much important. So Please help in resolving this issue.

Best Answer

I have discussed situations like this before in these posts:

May 10, 2013 : In place upgrade from MySQL 5.5 to 5.6.11 removes all users from user table
Sep 22, 2013 : How to create root user after running mysql_install_db?

In your case do this

STEP #1

Add these lines just under the [mysqld] group header in my.ini

[mysqld]
skip-grant-tables
skip-networking

STEP 2

Open Windows Command Line as Administrator, and reboot MySQL Service

C:\> net stop mysql
C:\> net start mysql

STEP 3

You can login to MySQL

C:\> mysql <Hit Enter>

STEP 4

From the mysql prompt, run this

SET @PasswordHash = PASSWORD('whateverpasswordiwant');
REPLACE INTO mysql.user SET
                  Host = 'root',
                  User = 'localhost',
              Password = @PasswordHash,
             Select_priv = 'Y',
             Insert_priv = 'Y',
             Update_priv = 'Y',
             Delete_priv = 'Y',
             Create_priv = 'Y',
               Drop_priv = 'Y',
             Reload_priv = 'Y',
           Shutdown_priv = 'Y',
            Process_priv = 'Y',
               File_priv = 'Y',
              Grant_priv = 'Y',
         References_priv = 'Y',
              Index_priv = 'Y',
              Alter_priv = 'Y',
            Show_db_priv = 'Y',
              Super_priv = 'Y',
   Create_tmp_table_priv = 'Y',
        Lock_tables_priv = 'Y',
            Execute_priv = 'Y',
         Repl_slave_priv = 'Y',
        Repl_client_priv = 'Y',
        Create_view_priv = 'Y',
          Show_view_priv = 'Y',
     Create_routine_priv = 'Y',
      Alter_routine_priv = 'Y',
        Create_user_priv = 'Y',
              Event_priv = 'Y',
            Trigger_priv = 'Y',
  Create_tablespace_priv = 'Y',
                ssl_type = '',
              ssl_cipher = '',
             x509_issuer = '',
            x509_subject = '',
           max_questions = 0,
             max_updates = 0,
         max_connections = 0,
    max_user_connections = 0
;
REPLACE INTO mysql.user SET
                  Host = 'root',
                  User = '127.0.0.1',
              Password = @PasswordHash,
             Select_priv = 'Y',
             Insert_priv = 'Y',
             Update_priv = 'Y',
             Delete_priv = 'Y',
             Create_priv = 'Y',
               Drop_priv = 'Y',
             Reload_priv = 'Y',
           Shutdown_priv = 'Y',
            Process_priv = 'Y',
               File_priv = 'Y',
              Grant_priv = 'Y',
         References_priv = 'Y',
              Index_priv = 'Y',
              Alter_priv = 'Y',
            Show_db_priv = 'Y',
              Super_priv = 'Y',
   Create_tmp_table_priv = 'Y',
        Lock_tables_priv = 'Y',
            Execute_priv = 'Y',
         Repl_slave_priv = 'Y',
        Repl_client_priv = 'Y',
        Create_view_priv = 'Y',
          Show_view_priv = 'Y',
     Create_routine_priv = 'Y',
      Alter_routine_priv = 'Y',
        Create_user_priv = 'Y',
              Event_priv = 'Y',
            Trigger_priv = 'Y',
  Create_tablespace_priv = 'Y',
                ssl_type = '',
              ssl_cipher = '',
             x509_issuer = '',
            x509_subject = '',
           max_questions = 0,
             max_updates = 0,
         max_connections = 0,
    max_user_connections = 0
;
exit

STEP 5

Remove skip-grant-tables and skip-networking from my.ini

STEP 6

Restart MySQL

C:\> net stop mysql
C:\> net start mysql

STEP 7

Try logging into MySQL

GIVE IT A TRY !!!

Related Solutions

MySQL Mistake with GRANT OPTION

There is no "mass revoke" statement so you best option to change this is to update the users table:

UPDATE mysql.user SET Grant_priv = 'N' WHERE user != 'root';

Not that occasionally, there are users that should have grant privileges (and should have that) which are not named root. On my system, for example, I have debian-sys-maint (which I actually wonder if they should have grant privileges, but that's how it's installed).

Do not forget to reload the privileges after changing the user table:

FLUSH PRIVILEGES;

You can find more information on http://dev.mysql.com/doc/refman/5.5/en/privilege-changes.html.

MySQL – How to Give root@localhost Permission to Grant Privileges

I have dealt with this issue before.

When you ran

select count(1) UserTableColumnCount from information_schema.columns
where table_schema='mysql' and table_name='user';

you should have gotten 42. That's how many columns MySQL 5.5 has for mysql.user. Since you got 39, that means you must have upgraded from MySQL 5.1. That has 39 columns.

I wrote an earlier post about the number of columns in mysql.user in different versions : MySQL service stops after trying to grant privileges to a user

Here is the post where I dealt with this : mysql: Restore All privileges to admin user

Hopefully you could run

# mysql_upgrade --upgrade-system-tables

to realign mysql.user and have it autofill missing permissions with Y.

Give it a Try !!!

If you want to try to fix the mysql.user manually, here are the steps:

#
# Backup the mysql.user table
#
CREATE TABLE mysql.user_backup LIKE mysql.user;
INSERT INTO mysql.user_backup SELECT * FROM mysql.user;
#
# Add Missing Columns
#
ALTER TABLE mysql.user 
    ADD COLUMN Create_tablespace_priv enum('N','Y') NOT NULL DEFAULT 'N'
    AFTER Trigger_Priv
;
ALTER TABLE mysql.user ADD COLUMN plugin char(64);
ALTER TABLE mysql.user ADD COLUMN authentication_string text DEFAULT NULL;
#
# Give root user all privileges
#
UPDATE mysql.user SET
Select_priv='Y',Insert_priv='Y',Update_priv='Y',Delete_priv='Y',
Create_priv='Y',Drop_priv='Y',Reload_priv='Y',Shutdown_priv='Y',
Process_priv='Y',File_priv='Y',Grant_priv='Y',References_priv='Y',
Index_priv='Y',Alter_priv='Y',Show_db_priv='Y',Super_priv='Y',
Create_tmp_table_priv='Y',Lock_tables_priv='Y',Execute_priv='Y',
Repl_slave_priv='Y',Repl_client_priv='Y',Create_view_priv='Y',
Show_view_priv='Y',Create_routine_priv='Y',Alter_routine_priv='Y',
Create_user_priv='Y',Event_priv='Y',Trigger_priv='Y',
Create_tablespace_priv='Y'
WHERE user='root';
FLUSH PRIVILEGES;

That's it !!!