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https://dev.mysql.com/doc/refman/5.7/en/statement-labels.html
[begin_label:] BEGIN [statement_list] END [end_label] [begin_label:] LOOP statement_list END LOOP [end_label] [begin_label:] REPEAT statement_list UNTIL search_condition END REPEAT [end_label] [begin_label:] WHILE search_condition DO statement_list ...If end_label is present, it must be the same as ...
https://dev.mysql.com/doc/refman/5.7/en/version-tokens-installation.html
For general information about installing or uninstalling plugins and loadable functions, see Section 5.5.1, “Installing and Uninstalling Plugins”, and Section 5.6.1, “Installing and Uninstalling Loadable Functions”. If necessary, configure ...To avoid this overhead, do not install it unless you plan to use ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-sql-statements.html
SELECT * FROM INFORMATION_SCHEMA.ENGINES [WHERE ENGINE LIKE 'NDB%'] This is the equivalent of SHOW ENGINES, but uses the ENGINES table of the INFORMATION_SCHEMA database. You can also query the tables in the ndbinfo information database for ... This ...SHOW ENGINES This statement can be used to determine whether or not clustering support is enabled in the MySQL server, and if so, whether it is ...
https://dev.mysql.com/doc/refman/5.7/en/ansi-diff-foreign-keys.html
When performing foreign key checks, InnoDB sets shared row-level locks on child or parent records that it must examine. row *************************** Table: shirt Create Table: CREATE TABLE `shirt` ( `id` smallint(5) unsigned NOT NULL ...For ...
https://dev.mysql.com/doc/refman/5.7/en/data-masking-functions.html
The following example shows how to convert the result of gen_rnd_email() to the utf8mb4 character set: SET @email = CONVERT(gen_rnd_email() USING utf8mb4); It may also be necessary to convert string arguments, as illustrated in Using Masked Data for ...If a string return value should be in a different character set, convert ...If a MySQL Enterprise Data Masking and De-Identification function is invoked from within the mysql client, binary string results ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-ndbinfo-processes.html
For other types of API nodes, it is the name of the executable program connected to the cluster; NDB API applications can set a custom value for this using Ndb_cluster_connection::set_name(). By default, API nodes other than SQL nodes use ndb:// for ... This table contains information about NDB Cluster node processes; each node is represented by the row in the ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-params-api.html
DefaultHashMapSize: Set size (in buckets) to use for table hash maps. HeartbeatThreadPriority: Set heartbeat thread policy and priority for API nodes; see manual for allowed values. The listing in this section provides information about parameters ...AutoReconnect: Specifies whether an API node should reconnect fully when disconnected from ...
https://dev.mysql.com/doc/refman/5.7/en/non-typed-operators.html
/ Division operator := Assign a value = Assign a value (as part of a SET statement, or as part of the SET clause in an UPDATE statement) = Equal operator ^ Bitwise XOR AND, && Logical AND BETWEEN ... ->> Return value from JSON column after ...
https://dev.mysql.com/doc/refman/5.7/en/order-by-optimization.html
Ideally, the value should be large enough for the entire result set to fit in the sort buffer (to avoid writes to disk and merge passes), but at minimum the value must be large enough to accommodate 15 tuples. This section describes when MySQL can ...An ORDER BY with and without LIMIT may return rows in different orders, as discussed in Section 8.2.1.17, “LIMIT Query ...
https://dev.mysql.com/doc/refman/5.7/en/problems-with-mysql-sock.html
On most versions of Unix, you can protect your /tmp directory so that files can be deleted only by their owners or the superuser (root). The default location for the Unix socket file that the server uses for communication with local clients is ...