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https://dev.mysql.com/doc/refman/8.0/en/upgrade-troubleshooting.html
In this case, remove all redo log files and restart the MySQL 5.7 server on the existing data directory to address the errors. After the errors are fixed, perform a slow shutdown (by setting innodb_fast_shutdown=0) before attempting the upgrade ...
https://dev.mysql.com/doc/refman/8.0/en/user-resources.html
One means of restricting client use of MySQL server resources is to set the global max_user_connections system variable to a nonzero value. This limits the number of simultaneous connections that can be made by any given account, but places no ...
https://dev.mysql.com/doc/refman/8.0/en/validate-password-options-variables.html
If validate_password rejects the new password, it reports an error indicating the minimum number of characters that must differ. The value cannot be set less than the value of this expression: validate_password.number_count + ... This section ...
https://dev.mysql.com/doc/refman/8.0/en/version-tokens-elements.html
Otherwise, the plugin returns an error to the client and the statement fails. If the server has a different state when a client sends a statement, the client receives an error. Version Tokens is based on a plugin library that implements these ...
https://dev.mysql.com/doc/refman/8.0/en/view-check-option.html
The check for v3 also fails: mysql> INSERT INTO v2 VALUES (2); ERROR 1369 (HY000): CHECK OPTION failed 'test.v2' mysql> INSERT INTO v3 VALUES (2); ERROR 1369 (HY000): CHECK OPTION failed 'test.v3' . The WITH CHECK OPTION clause can be given for an ...
https://dev.mysql.com/doc/refman/8.0/en/view-restrictions.html
Then the view replicates properly, and can be dumped and reloaded without causing an error. The maximum number of tables that can be referenced in the definition of a view is 61. View processing is not optimized: It is not possible to create an ...
https://dev.mysql.com/doc/refman/8.0/en/window-function-descriptions.html
This section describes nonaggregate window functions that, for each row from a query, perform a calculation using rows related to that row. Most aggregate functions also can be used as window functions; see Section 14.19.1, “Aggregate Function ...
https://dev.mysql.com/doc/refman/8.0/en/windows-start-service.html
If mysqld does not start, check the error log to see whether the server wrote any messages there to indicate the cause of the problem. The error log is located in the MySQL data directory (for example, C:\Program Files\MySQL\MySQL Server 8.0\data).
https://dev.mysql.com/doc/refman/8.0/en/xa-restrictions.html
The error ER_XA_REPLICATION_FILTERS is logged whenever an XA transaction is impacted by a replication filter, whether or not the transaction was empty as a result. Undo the XA transaction that generated the error message, then restart replication.
https://dev.mysql.com/doc/refman/8.0/en/apis-perl.html
The Perl DBI module provides a generic interface for database access. You can write a DBI script that works with many different database engines without change. To use DBI with MySQL, install the following: The DBI module. Optionally, the DBD ...