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https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ps-tables.html
row *************************** NAME: memory/ndbcluster/Thd_ndb::batch_mem_root ENABLED: YES TIMED: NULL PROPERTIES: VOLATILITY: 0 DOCUMENTATION: Memory used for transaction batching 1 row in set (0.01 sec) . NDB 8.0 provides information in the ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-quick.html
To familiarize you with the basics, we describe the simplest possible configuration for a functional NDB Cluster. After this, you should be able to design your desired setup from the information provided in the other relevant sections of this ...
25.7.9.1 NDB Cluster Replication: Automating Synchronization of the Replica to the Source Binary Log
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-replication-auto-sync.html
It is possible to automate much of the process described in the previous section (see Section 25.7.9, “NDB Cluster Backups With NDB Cluster Replication”). The following Perl script reset-replica.pl serves as an example of how you can do this.
https://dev.mysql.com/doc/refman/8.0/en/mysql-command-options.html
<field name="column_name">NULL</field> The output when --xml is used with mysql matches that of mysqldump --xml. mysql supports the following options, which can be specified on the command line or in the [mysql] and [client] groups of an option ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-shell-tutorial-javascript-documents-find.html
mysql-js> db.countryinfo.find() [ { "GNP": 828, "Code:": "ABW", "Name": "Aruba", "IndepYear": null, "geography": { "Continent": "North America", "Region": "Caribbean", "SurfaceArea": 193 }, "government": { "GovernmentForm": "Nonmetropolitan ... You ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-shell-tutorial-python-documents-collections.html
Simple document format for Python: {"field1": "value", "field2" : 10, "field 3": null} An array of documents consists of a set of documents separated by commas and enclosed within [ and ] characters. When you are using MySQL as a Document Store, ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-shell-tutorial-python-documents-find.html
mysql-py> db.countryinfo.find() [ { "GNP": 828, "Code:": "ABW", "Name": "Aruba", "IndepYear": null, "geography": { "Continent": "North America", "Region": "Caribbean", "SurfaceArea": 193 }, "government": { "GovernmentForm": "Nonmetropolitan ... You ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-tips.html
Connection id: 1 Current database: test Query OK, 1 row affected (1.30 sec) mysql> SELECT * FROM t; +------+ | a | +------+ | NULL | +------+ 1 row in set (0.05 sec) The @a user variable has been lost with the connection, and after the reconnection ... This section provides information about techniques for more effective use of mysql and about mysql operational ...
https://dev.mysql.com/doc/refman/8.0/en/mysqlslap.html
mysqlslap --delimiter=";" --number-of-queries=10 --query="use test;insert into t values(null)" --only-print Command-Line Format --only-print Type Boolean Default Value FALSE Do not connect to databases. mysqlslap is a diagnostic program designed to ...
https://dev.mysql.com/doc/refman/8.0/en/order-by-optimization.html
In MySQL 8.0, that no longer occurs, so specifying ORDER BY NULL at the end to suppress implicit sorting (as was done previously) is no longer necessary. This section describes when MySQL can use an index to satisfy an ORDER BY clause, the filesort ...