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https://dev.mysql.com/doc/refman/8.0/en/show-collation.html
SHOW COLLATION [LIKE 'pattern' | WHERE expr] This statement lists collations supported by the server. By default, the output from SHOW COLLATION includes all available collations. The LIKE clause, if present, indicates which collation names to ...
https://dev.mysql.com/doc/refman/8.0/en/show-variables.html
System variable information is also available from these sources: Performance Schema tables. SHOW [GLOBAL | SESSION] VARIABLES [LIKE 'pattern' | WHERE expr] SHOW VARIABLES shows the values of MySQL system variables (see Section 7.1.8, “Server ...
https://dev.mysql.com/doc/refman/8.0/en/spatial-function-reference.html
The following table lists each spatial function and provides a short description of each one.
https://dev.mysql.com/doc/refman/8.0/en/spatial-geojson-functions.html
This section describes functions for converting between GeoJSON documents and spatial values. Feature and FeatureCollection objects are not supported, except that geometry objects are extracted from them. MySQL also supports a native JSON data type ...
https://dev.mysql.com/doc/refman/8.0/en/spatial-relation-functions-object-shapes.html
Unless otherwise specified, functions handle their unit argument as follows: A unit is supported if it is found in the INFORMATION_SCHEMA ST_UNITS_OF_MEASURE table. The OpenGIS specification defines the following functions to test the relationship ...
https://dev.mysql.com/doc/refman/8.0/en/sys-extract-schema-from-file-name.html
For this reason, it does not work with partitions or tables defined using their own DATA_DIRECTORY table option. Given a file path name, returns the path component that represents the schema name. This function assumes that the file name lies ...
https://dev.mysql.com/doc/refman/8.0/en/sys-format-statement.html
This function is useful for formatting possibly lengthy statements retrieved from Performance Schema tables to a known fixed maximum length. Configuration Options format_statement() operation can be modified using the following configuration options ... Given a string (normally representing an SQL statement), reduces it to the length given by the statement_truncate_len configuration option, and returns the ...
https://dev.mysql.com/doc/refman/8.0/en/sys-host-summary-by-statement-latency.html
Rows for which the HOST 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 host.
https://dev.mysql.com/doc/refman/8.0/en/sys-host-summary-by-statement-type.html
Rows for which the HOST 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-host-summary.html
Rows for which the HOST 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 ...