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https://dev.mysql.com/doc/refman/8.4/en/partitioning-management-range-list.html
It is very important to remember that, when you drop a partition, you also delete all the data that was stored in that partition. DROP PARTITION with ALGORITHM=INPLACE deletes data stored in the partition and drops the partition. However, DROP ...
https://dev.mysql.com/doc/refman/8.4/en/encryption-functions.html
If you want to store these results, use a column with a VARBINARY or BLOB binary string data type. AES_DECRYPT(crypt_str,key_str[,init_vector][,kdf_name][,salt][,info | iterations]) This function decrypts data using the official AES (Advanced ...
https://dev.mysql.com/doc/refman/8.4/en/select-into.html
If the query returns no rows, a warning with error code 1329 occurs (No data), and the variable values remain unchanged. SELECT id, data INTO @x, @y FROM test.t1 LIMIT 1; INTO var_list can also be used with a TABLE statement, subject to these ...An ...INTO form of SELECT enables a query result to be stored in variables or written to a file: SELECT ...
https://dev.mysql.com/doc/refman/8.4/en/system-schema.html
mysql system tables and data dictionary tables reside in a single InnoDB tablespace file named mysql.ibd in the MySQL data directory. Data dictionary tables and system tables use the InnoDB storage engine unless otherwise indicated. Previously, ...A ...It contains tables that store information required by the MySQL server as it ...
https://dev.mysql.com/doc/workbench/en/wb-what-is-new-61.html
It also displays traditional EXPLAIN output in a separate tab, and the Raw Explain Data (as JSON) in another. This section summarizes many of the new features added to MySQL Workbench 6.1, in relation to the MySQL Workbench 6.0 release. New ...
https://dev.mysql.com/doc/workbench/en/wb-mysql-utilities.html
show errors Display errors captured during the execution of the utilities. show last error Display the last error captured during the execution of the utilities help | help commands Show this list. These utilities encapsulate a set of primitive ...
https://dev.mysql.com/doc/mysql-em-plugin/en/myoem-performance-page-per-table-stats.html
Table 5.10 Per Table Statistics Dashboard NameDescription Table Name The table name. Delete Latency The total wait time of timed delete I/O events for the table. Fetch Latency The total wait time of timed read I/O events for the table. Insert ...By ...
https://dev.mysql.com/doc/refman/8.4/en/upgrading-what-is-upgraded.html
With --upgrade=NONE, the server upgrades nothing (skips steps 1 and 2), but also exits with an error if the data dictionary must be upgraded. If both versions indicate an upgrade is needed, the data dictionary upgrade must occur first. If the server ...System tables (that is, the remaining non-data dictionary tables), which are used for other operational ... Installing a new version of MySQL may require upgrading these parts of the existing installation: The mysql system schema, which contains tables ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-replication-conflict-resolution.html
You must create any exceptions table before creating the data table with which it is to be used. Important The mysql.ndb_replication table is read when a data table is set up for replication, so the row corresponding to a table to be replicated must ... Requirements Source Column Control Conflict Resolution Control Conflict Resolution Functions Conflict Resolution Exceptions Table Conflict Detection Status Variables Examples When using a replication setup involving multiple sources (including circular replication), it is possible that different sources may try to update the same row on the replica with different ...
https://dev.mysql.com/doc/refman/8.4/en/symbolic-links-to-tables.html
To determine whether your system supports symbolic links, check the value of the have_symlink system variable using this statement: SHOW VARIABLES LIKE 'have_symlink'; The handling of symbolic links for MyISAM tables works as follows: In the data ...