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https://dev.mysql.com/doc/refman/8.0/en/starting-server.html
If the command fails immediately and prints mysqld ended, look for information in the error log (which by default is the host_name.err file in the data directory). If the server is unable to access the data directory it starts or read the grant ...
https://dev.mysql.com/doc/refman/8.0/en/stored-program-restrictions.html
If you refer to a temporary table multiple times in a stored function under different aliases, a Can't reopen table: 'tbl_name' error occurs, even if the references occur in different statements within the function. READ statements that invoke ...
https://dev.mysql.com/doc/refman/8.0/en/subquery-restrictions.html
MySQL does not support LIMIT in subqueries for certain subquery operators: mysql> SELECT * FROM t1 WHERE s1 IN (SELECT s2 FROM t2 ORDER BY s1 LIMIT 1); ERROR 1235 (42000): This version of MySQL doesn't yet support 'LIMIT & IN/ALL/ANY/SOME subquery' ... In general, you cannot modify a table and select from the same table in a ...
https://dev.mysql.com/doc/refman/8.0/en/thread-pool-installation.html
If the plugin fails to initialize, check the server error log for diagnostic messages. If a plugin fails to initialize, check the server error log for diagnostic messages. This section describes how to install MySQL Enterprise Thread Pool. For ...
https://dev.mysql.com/doc/refman/8.0/en/time-zone-support.html
Otherwise, use of a named time zone results in an error: mysql> SET time_zone = 'UTC'; ERROR 1298 (HY000): Unknown or incorrect time zone: 'UTC' Populating the Time Zone Tables Several tables in the mysql system schema exist to store time zone ...
https://dev.mysql.com/doc/refman/8.0/en/upgrade-best-practices.html
Check for errors and warnings in the MySQL error log and application logs. MySQL supports upgrading between minor versions (within an LTS series) and to the next major version (across an LTS series). LTS releases have 8+ years of support and are ...
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 ...