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https://dev.mysql.com/doc/refman/9.7/en/privilege-changes.html
If the mysqld server is started without the --skip-grant-tables option, it reads all grant table contents into memory during its startup sequence. The in-memory tables become effective for access control at that point. If you modify the grant ...
https://dev.mysql.com/doc/refman/9.7/en/problems-with-null.html
The concept of the NULL value is a common source of confusion for newcomers to SQL, who often think that NULL is the same thing as an empty string ''. For example, the following statements are completely different: mysql> INSERT INTO my_table ...
https://dev.mysql.com/doc/refman/9.7/en/query-attributes.html
The most visible part of an SQL statement is the text of the statement. Clients can also define query attributes that apply to the next statement sent to the server for execution: Attributes are defined prior to sending the statement. Attributes ...
https://dev.mysql.com/doc/refman/9.7/en/rename-table.html
RENAME TABLE tbl_name TO new_tbl_name [, tbl_name2 TO new_tbl_name2] ... You must have ALTER and DROP privileges for the original table, and CREATE and INSERT privileges for the new table. You can rename tables locked with a LOCK TABLES statement, ...
https://dev.mysql.com/doc/refman/9.7/en/replica-io-thread-states.html
The following list shows the most common states you see in the State column for a replication I/O (receiver) thread on a replica server. This state also appears in the Replica_IO_State column displayed by SHOW REPLICA STATUS, so you can get a good ...
https://dev.mysql.com/doc/refman/9.7/en/replica-logs-status.html
A replica server creates two replication metadata repositories, the connection metadata repository and the applier metadata repository. If binary log file position based replication is in use, when the replica restarts, it reads the two ...
https://dev.mysql.com/doc/refman/9.7/en/replication-binlog-encryption-scope.html
Existing binary log files and relay log files that were present on the server when you started encryption are not encrypted. You can purge these files when they are no longer needed. Data in motion in the replication event stream, which is sent to ...
https://dev.mysql.com/doc/refman/9.7/en/replication-features-transaction-inconsistencies.html
Inconsistencies in the sequence of transactions that have been executed from the relay log can occur depending on your replication configuration. This section explains how to avoid inconsistencies and solve any problems they cause. A transaction ...
https://dev.mysql.com/doc/refman/9.7/en/replication-gtids-auto-positioning.html
GTIDs replace the file-offset pairs previously required to determine points for starting, stopping, or resuming the flow of data between source and replica. When GTIDs are in use, all the information that the replica needs for synchronizing with ...
https://dev.mysql.com/doc/refman/9.7/en/replication-howto-masterstatus.html
To configure the replica to start the replication process at the correct point, you need to note the source's current coordinates within its binary log. Warning This procedure uses FLUSH TABLES WITH READ LOCK, which blocks COMMIT operations for ...