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https://dev.mysql.com/doc/refman/5.7/en/show-columns.html
The data types may differ from what you expect them to be based on a CREATE TABLE statement because MySQL sometimes changes data types when you create or alter a table. SHOW [FULL] {COLUMNS | FIELDS} {FROM | IN} tbl_name [{FROM | IN} db_name] [LIKE ...SHOW COLUMNS displays information only for those columns for which you have some ...
https://dev.mysql.com/doc/refman/5.7/en/myisam-check.html
To check a MyISAM table, use the following commands: myisamchk tbl_name This finds 99.99% of all errors. If you want to check a table, you should normally run myisamchk without options or with the -s (silent) option. This may take a long time for a ...What it cannot find is corruption that involves only the data file (which is very ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-ndbinfo-blocks.html
The blocks table is a static table which simply contains the names and internal IDs of all NDB kernel blocks (see NDB Kernel Blocks). It is for use by the other ndbinfo tables (most of which are actually views) in mapping block numbers to block ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-ndbinfo-cluster-transactions.html
The cluster_transactions table shows information about all ongoing transactions in an NDB Cluster. Together with the block name, this number can be used to look up a given instance in the threadblocks table. You can use this along with the block ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-ndbinfo-config-params.html
The config_params table is a static table which provides the names and internal ID numbers of and other information about NDB Cluster configuration parameters. Although this is a static table, its content can vary between NDB Cluster installations, ...The param_description, param_type, param_default, param_min, param_max, param_mandatory, and param_status columns were all added in NDB ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-ndbinfo-config-values.html
The config_values table, implemented in NDB 7.5.0, provides information about the current state of node configuration parameter values. Each row in the table corresponds to the current value of a parameter on a given node. node_id ID of the node in ...You can obtain output that is more specific, more detailed, or both by issuing the proper ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-ndbinfo-nodes.html
This table contains information on the status of data nodes. For each data node that is running in the cluster, a corresponding row in this table provides the node's node ID, status, and uptime. The nodes table contains the following columns: ...
https://dev.mysql.com/doc/refman/5.7/en/silent-column-changes.html
In some cases, MySQL silently changes column specifications from those given in a CREATE TABLE or ALTER TABLE statement. See Section 8.4.7, “Limits on Table Column Count and Row Size”. Trailing spaces are automatically deleted from ENUM and SET ...These might be changes to a data type, to attributes associated with a data type, or to an index ...
https://dev.mysql.com/doc/refman/5.7/en/sys-schema-progress-reporting.html
The following sys schema views provide progress reporting for long-running transactions: processlist session x$processlist x$session Assuming that the required instruments and consumers are enabled, the progress column of these views shows the ...
https://dev.mysql.com/doc/refman/5.7/en/audit-log-filtering.html
Note As of MySQL 5.7.13, for audit log filtering to work as described here, the audit log plugin and the accompanying audit tables and functions must be installed. If the plugin is installed without the accompanying audit tables and functions ...