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https://dev.mysql.com/doc/refman/8.0/en/stored-routines-metadata.html
Use the SHOW CREATE PROCEDURE and SHOW CREATE FUNCTION statements to see routine definitions. Use the SHOW PROCEDURE STATUS and SHOW FUNCTION STATUS statements to see routine characteristics. Use the SHOW PROCEDURE CODE and SHOW FUNCTION CODE ... To ...
https://dev.mysql.com/doc/refman/8.0/en/sys-format-bytes.html
Note As of MySQL 8.0.16, format_bytes() is deprecated and subject to removal in a future MySQL version. See Section 14.21, “Performance Schema Functions” Given a byte count, converts it to human-readable format and returns a string consisting ...Applications that use it should be migrated to use the built-in FORMAT_BYTES() function ...
https://dev.mysql.com/doc/refman/8.0/en/sys-list-add.html
Adds a value to a comma-separated list of values and returns the result. This function and list_drop() can be useful for manipulating the value of system variables such as sql_mode and optimizer_switch that take a comma-separated list of values.
https://dev.mysql.com/doc/refman/8.0/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/8.0/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/8.0/en/sys-schema-reference.html
The sys schema includes tables and triggers, views, and stored procedures and functions.
https://dev.mysql.com/doc/refman/8.0/en/thread-pool-elements.html
The thread_handling system variable has a value of loaded-dynamically when the server successfully loads the thread pool plugin. The other related system variables are implemented by the thread pool plugin and are not available unless it is enabled.
https://dev.mysql.com/doc/refman/8.0/en/trace-general-structure.html
A trace follows the actual execution path very closely; for each join, there is a join preparation object, a join optimization object, and a join execution object. Query transformations (IN to EXISTS, outer join to inner join, and so on), ...Calls ...
https://dev.mysql.com/doc/refman/8.0/en/using-stack-trace.html
You can use this to find out where (and maybe why) mysqld died. stack_bottom = 0x41fd0110 thread_stack 0x40000 mysqld(my_print_stacktrace+0x32)[0x9da402] mysqld(handle_segfault+0x28a)[0x6648e9] /lib/libpthread.so.0[0x7f1a5af000f0] ... On some ...
https://dev.mysql.com/doc/refman/8.0/en/window-function-restrictions.html
The SQL standard imposes a constraint on window functions that they cannot be used in UPDATE or DELETE statements to update rows. Note that a single query may use multiple SELECT clauses, and each of these clauses supports up to 127 windows. The ...