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https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-server-transactions.html
The server_transactions table is subset of the cluster_transactions table, but includes only those transactions in which the current SQL node (MySQL Server) is a participant, while including the relevant connection IDs. Together with the block ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-transporter-details.html
This table contains information about individual NDB transporters, rather than aggregate information as shown by the transporters table. The transporter_details table displays a row showing the status of each transporter in the cluster. See the ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-command-options.html
The DROP TABLE and CREATE TABLE statements are not executed because the default database is not db1, even though the statements name a table in db1. The INSERT and CREATE TABLE statements are executed because the default database is db1, even though ...This option is on by default, which enables database, table, and column name ... mysql supports the following options, which can be ...
https://dev.mysql.com/doc/refman/8.0/en/invisible-indexes.html
ALTER INDEX operation: ALTER TABLE t1 ALTER INDEX i_idx INVISIBLE; ALTER TABLE t1 ALTER INDEX i_idx VISIBLE; Information about whether an index is visible or invisible is available from the Information Schema STATISTICS table or SHOW INDEX output.
https://dev.mysql.com/doc/refman/8.0/en/clone-plugin-remote.html
Use this option if you do not want to remove existing user-created data (schemas, tables, tablespaces) and binary logs from the recipient data directory. When the optional DATA DIRECTORY [=] 'clone_dir' clause is not used, a cloning operation ...The ... The clone plugin supports the following syntax for cloning remote data; that is, cloning data from a remote MySQL server instance (the donor) and transferring it to the MySQL instance where the cloning operation was initiated (the ...
https://dev.mysql.com/doc/refman/8.0/en/partitioning-management-hash-key.html
Tables which are partitioned by hash or by key are very similar to one another with regard to making changes in a partitioning setup, and both differ in a number of ways from tables which have been partitioned by range or list. For that reason, ...
https://dev.mysql.com/doc/refman/8.0/en/commit.html
In read-only mode, it remains possible to change tables created with the TEMPORARY keyword using DML statements. To disable autocommit mode implicitly for a single series of statements, use the START TRANSACTION statement: START TRANSACTION; SELECT ...SET autocommit disables or enables the default autocommit mode for the current ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-locking-reads.html
However, FOR SHARE supports OF table_name, NOWAIT, and SKIP LOCKED options. FOR SHARE requires the SELECT privilege and at least one of the DELETE, LOCK TABLES, or UPDATE privileges. FOR SHARE statements do not acquire read locks on MySQL grant ...
https://dev.mysql.com/doc/refman/8.0/en/json-search-functions.html
Starting with MySQL 8.0.17, queries using JSON_CONTAINS() on InnoDB tables can be optimized using multi-valued indexes; see Multi-Valued Indexes, for more information. row *************************** id: 1 select_type: SIMPLE table: jemp partitions: ... The functions in this section perform search or comparison operations on JSON values to extract data from them, report whether data exists at a location within them, or report the path to data within ...
https://dev.mysql.com/doc/refman/8.0/en/blackhole-storage-engine.html
When you create a BLACKHOLE table, the server creates the table definition in the global data dictionary. The setup for the source is: CREATE TABLE t1 (public_col_1, ..., public_col_N, secret_col_1, ..., secret_col_M) ENGINE=MyISAM; The setup for ...