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https://dev.mysql.com/doc/refman/8.0/en/replication-multi-source.html
MySQL multi-source replication enables a replica to receive transactions from multiple immediate sources in parallel. A multi-source replica can also be set up as a multi-threaded replica, by setting the system variable replica_parallel_workers ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-restart-info.html
Each entry in the table corresponds to a node restart status report in real time from a data node with the given node ID. Only the most recent report for any given node is shown. The restart_info table contains the following columns: node_id Node ID ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-logs-cluster-log.html
CommunicationOpened Connection 8 INFO Node mgm_node_id: Node api_node_id: API version The API node having node ID api_node_id has connected to management node mgm_node_id using NDB API version version (generally the same as the MySQL version number). LCPFragmentCompleted Checkpoint 11 INFO Node node_id: ACC Blocked num_1 and TUP Blocked num_2 times last second Undo logging is blocked because the log buffer is close to ...
https://dev.mysql.com/doc/refman/8.0/en/string-comparison-functions.html
If a string function is invoked from within the mysql client, binary strings display using hexadecimal notation, depending on the value of the --binary-as-hex. For more information about that option, see Section 6.5.1, “mysql — The MySQL ...
https://dev.mysql.com/doc/refman/8.0/en/json-validation-functions.html
Beginning with MySQL 8.0.17, MySQL supports validation of JSON documents against JSON schemas conforming to Draft 4 of the JSON Schema specification. MySQL supports the required attribute in JSON schemas to enforce the inclusion of required ...This ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-online-add-node-basics.html
ALGORITHM=INPLACE, REORGANIZE PARTITION statement in the mysql client for each NDBCLUSTER table. Note This needs to be done only for tables already existing at the time the new node group is added. You can do this by issuing, for each NDBCLUSTER ...
https://dev.mysql.com/doc/refman/8.0/en/create-procedure.html
The DEFINER clause specifies the MySQL account to be used when checking access privileges at routine execution time for routines that have the SQL SECURITY DEFINER characteristic. The CREATE FUNCTION statement is also used in MySQL to support ...By ...
https://dev.mysql.com/doc/refman/8.0/en/optimizer-hints.html
Optimizer Hint Syntax MySQL supports comments in SQL statements as described in Section 11.7, “Comments”. Duplicate hints: For a hint such as /*+ MRR(idx1) MRR(idx1) */, MySQL uses the first hint and issues a warning about the duplicate hint.
https://dev.mysql.com/doc/refman/8.0/en/common-errors.html
This section lists some errors that users frequently encounter when running MySQL programs. Although the problems show up when you try to run client programs, the solutions to many of the problems involves changing the configuration of the MySQL ...
https://dev.mysql.com/doc/refman/8.0/en/faqs-connectors-apis.html
For common questions, issues, and answers relating to the MySQL Connectors and other APIs, see the following areas of the Manual: Using C API Features Connector/ODBC Notes and Tips Connector/NET Programming MySQL Connector/J Developer Guide .