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https://dev.mysql.com/doc/refman/8.0/en/sys-user-summary-by-statement-latency.html
Rows for which the USER column in the underlying Performance Schema table is NULL are assumed to be for background threads and are reported with a host name of background. full_scans The total number of full table scans by statements for the user.
https://dev.mysql.com/doc/refman/8.0/en/sys-user-summary-by-statement-type.html
Rows for which the USER column in the underlying Performance Schema table is NULL are assumed to be for background threads and are reported with a host name of background. full_scans The total number of full table scans by occurrences of the ...
https://dev.mysql.com/doc/refman/8.0/en/sys-user-summary.html
Rows for which the USER column in the underlying Performance Schema table is NULL are assumed to be for background threads and are reported with a host name of background. These views summarize statement activity, file I/O, and connections, grouped ...
https://dev.mysql.com/doc/refman/8.0/en/using-spatial-indexes.html
The optimizer investigates whether available spatial indexes can be involved in the search for queries that use a function such as MBRContains() or MBRWithin() in the WHERE clause. The following query finds all objects that are in the given ...
https://dev.mysql.com/doc/refman/8.0/en/validate-password-installation.html
INSTALL COMPONENT loads the component, and also registers it in the mysql.component system table to cause it to be loaded during subsequent server startups. To uninstall the validate_password component, use this statement: UNINSTALL COMPONENT ...
https://dev.mysql.com/doc/refman/8.0/en/window-function-descriptions.html
This section describes nonaggregate window functions that, for each row from a query, perform a calculation using rows related to that row. Most aggregate functions also can be used as window functions; see Section 14.19.1, “Aggregate Function ...
https://dev.mysql.com/doc/refman/8.0/en/windows-installation-layout.html
All of the files are located within this parent directory, using the structure shown in the following table. Table 2.4 Default MySQL Installation Layout for Microsoft Windows Directory Contents of Directory Notes bin mysqld server, client and ...
https://dev.mysql.com/doc/refman/8.0/en/x-plugin-option-variable-reference.html
This table provides an overview of the command options, system variables, and status variables provided by X Plugin.
https://dev.mysql.com/doc/refman/8.0/en/x-plugin-system-monitoring.html
To be able to monitor the generated SQL, the Performance Schema tables must be enabled. The SQL is registered under the performance_schema.events_statements_current, performance_schema.events_statements_history, and ... For general X Plugin ...
https://dev.mysql.com/doc/refman/8.0/en/xa-states.html
An XA transaction progresses through the following states: Use XA START to start an XA transaction and put it in the ACTIVE state. For an ACTIVE XA transaction, issue the SQL statements that make up the transaction, and then issue an XA END ...