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https://dev.mysql.com/doc/refman/5.7/en/spatial-type-overview.html
MySQL has spatial data types that correspond to OpenGIS classes. The basis for these types is described in Section 11.4.2, “The OpenGIS Geometry Model”. Some spatial data types hold single geometry values: GEOMETRY POINT LINESTRING POLYGON ...
https://dev.mysql.com/doc/refman/5.7/en/stored-objects.html
Trigger: An object created with CREATE TRIGGER that is associated with a table. A trigger is activated when a particular event occurs for the table, such as an insert or update. This chapter discusses stored database objects that are defined in ...
https://dev.mysql.com/doc/refman/5.7/en/sys-innodb-buffer-stats-by-schema.html
These views summarize the information in the INFORMATION_SCHEMA INNODB_BUFFER_PAGE table, grouped by schema. Warning Querying views that access the INNODB_BUFFER_PAGE table can affect performance. Do not query these views on a production system ...
https://dev.mysql.com/doc/refman/5.7/en/sys-ps-setup-save.html
It is intended you call ps_setup_reload_saved() later within the same session as ps_setup_save() because the configuration is saved in TEMPORARY tables. If you end your session without invoking ps_setup_save(), the tables and lock disappear ...This ...
https://dev.mysql.com/doc/refman/5.7/en/sys-ps-setup-show-disabled.html
Displays all currently disabled Performance Schema configuration. Parameters in_show_instruments BOOLEAN: Whether to display disabled instruments. This might be a long list. in_show_threads BOOLEAN: Whether to display disabled threads. Example ...
https://dev.mysql.com/doc/refman/5.7/en/sys-ps-trace-statement-digest.html
If you find a statement of interest within the Performance Schema events_statements_summary_by_digest table, specify its DIGEST column MD5 value to this procedure and indicate the polling duration and interval. in_start_fresh BOOLEAN: Whether to ...
https://dev.mysql.com/doc/refman/5.7/en/sys-statement-analysis.html
full_scan The total number of full table scans performed by occurrences of the statement. tmp_tables The total number of internal in-memory temporary tables created by occurrences of the statement. tmp_disk_tables The total number of internal ...The ...
https://dev.mysql.com/doc/refman/5.7/en/thread-pool-operation.html
As connections are established, the thread pool assigns them to thread groups in round-robin fashion. A statement becomes blocked if it encounters a disk I/O operation or a user level lock (row lock or table lock). Thus, given a mix of statements ...
https://dev.mysql.com/doc/refman/5.7/en/use.html
The named database remains the default until the end of the session or another USE statement is issued: USE db1; SELECT COUNT(*) FROM mytable; # selects from db1.mytable USE db2; SELECT COUNT(*) FROM mytable; # selects from db2.mytable The database ... USE db_name The USE statement tells MySQL to use the named database as the default (current) database for subsequent ...
https://dev.mysql.com/doc/refman/5.7/en/user-variables.html
(Exception: A user with access to the Performance Schema user_variables_by_thread table can see all user variables for all sessions.) All variables for a given client session are automatically freed when that client exits. (This is the same ... You ...