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https://dev.mysql.com/doc/refman/5.7/en/show-databases.html
Caution Because a global privilege is considered a privilege for all databases, any global privilege enables a user to see all database names with SHOW DATABASES or by examining the INFORMATION_SCHEMA SCHEMATA table. SHOW {DATABASES | SCHEMAS} ...
https://dev.mysql.com/doc/refman/5.7/en/show-relaylog-events.html
Note Some events relating to the setting of user and system variables are not included in the output from SHOW RELAYLOG EVENTS. SHOW RELAYLOG EVENTS [IN 'log_name'] [FROM pos] [LIMIT [offset,] row_count] [channel_option] channel_option: FOR CHANNEL ...
https://dev.mysql.com/doc/refman/5.7/en/stored-program-variables.html
System variables and user-defined variables can be used in stored programs, just as they can be used outside stored-program context. In addition, stored programs can use DECLARE to define local variables, and stored routines (procedures and ...
https://dev.mysql.com/doc/refman/5.7/en/sys-format-statement.html
Configuration Options format_statement() operation can be modified using the following configuration options or their corresponding user-defined variables (see Section 26.4.2.1, “The sys_config Table”): statement_truncate_len, ... Given a string ...
https://dev.mysql.com/doc/refman/5.7/en/sys-host-summary.html
These views summarize statement activity, file I/O, and connections, grouped by host. The host_summary and x$host_summary views have these columns: host The host from which the client connected. Rows for which the HOST column in the underlying ...
https://dev.mysql.com/doc/refman/5.7/en/sys-ps-setup-reset-to-default.html
row *************************** status: Resetting: setup_actors DELETE FROM performance_schema.setup_actors WHERE NOT (HOST = '%' AND USER = '%' AND ROLE = '%') *************************** 1. Parameters in_verbose BOOLEAN: Whether to display ...
https://dev.mysql.com/doc/refman/5.7/en/sys-ps-thread-trx-info.html
Configuration Options ps_thread_trx_info() operation can be modified using the following configuration options or their corresponding user-defined variables (see Section 26.4.2.1, “The sys_config Table”): ps_thread_trx_info.max_length, ...
https://dev.mysql.com/doc/refman/5.7/en/sys-schema-prerequisites.html
Before using the sys schema, the prerequisites described in this section must be satisfied. Because the sys schema provides an alternative means of accessing the Performance Schema, the Performance Schema must be enabled for the sys schema to work.
https://dev.mysql.com/doc/refman/5.7/en/sys-schema-table-statistics-with-buffer.html
These views summarize table statistics, including InnoDB buffer pool statistics. By default, rows are sorted by descending total wait time (tables with most contention first). The schema_table_statistics_with_buffer and ...
https://dev.mysql.com/doc/refman/5.7/en/sys-schema-table-statistics.html
By default, rows are sorted by descending total wait time (tables with most contention first). The schema_table_statistics and x$schema_table_statistics views have these columns: table_schema The schema that contains the table. total_latency The ...