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https://dev.mysql.com/doc/refman/8.0/en/mysql-shell-tutorial-python-documents-modify.html
mysql-py> db.countryinfo.modify("Code = 'SEA'").set( "demographics", {"LifeExpectancy": 78, "Population": 28}) After you modify a document, use the find() method to verify the change. You can use the modify() method to update one or more documents ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-and-plugins.html
Removing a plugin with UNINSTALL PLUGIN does not affect information already collected for code in that plugin. Time spent executing the code while the plugin was loaded was still spent even if the plugin is unloaded later. A plugin implementor who ...The associated event information, including aggregate information, remains readable in performance_schema database ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-events-waits-current-table.html
SOURCE The name of the source file containing the instrumented code that produced the event and the line number in the file at which the instrumentation occurs. This enables you to check the source to determine exactly what code is involved. If the ...The table stores one row per thread showing the current status of the thread's most recent monitored wait event, so there is no system variable for configuring the table ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-mutex-instances-table.html
A mutex is a synchronization mechanism used in the code to enforce that only one thread at a given time can have access to some common resource. For every mutex instrumented in the code, the Performance Schema provides the following information.
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-stage-tables.html
The definition of “work unit” for a particular instrument is left to the instrumentation code providing the data. The WORK_COMPLETED value can increase one or many units at a time, depending on the instrumented code. The WORK_ESTIMATED value can ... The Performance Schema instruments stages, which are steps during the statement-execution process, such as parsing a statement, opening a table, or performing a filesort ...
https://dev.mysql.com/doc/refman/8.0/en/stored-routines-metadata.html
Use the SHOW PROCEDURE CODE and SHOW FUNCTION CODE statements to see a representation of the internal implementation of the routine. To obtain metadata about stored routines: Query the ROUTINES table of the INFORMATION_SCHEMA database. Use the SHOW ...
https://dev.mysql.com/doc/refman/8.0/en/what-is-mysql.html
Depending on your programming environment, you might enter SQL directly (for example, to generate reports), embed SQL statements into code written in another language, or use a language-specific API that hides the SQL syntax. If you wish, you may ...
https://dev.mysql.com/doc/refman/8.0/en/alter-table-partition-operations.html
The REBUILD keyword is expressly disallowed with subpartitions, and causes ALTER TABLE to fail with an error if so used. CHECK PARTITION and REPAIR PARTITION operations fail when the partition to be checked or repaired contains any duplicate key ...
https://dev.mysql.com/doc/refman/8.0/en/archive-storage-engine.html
Attempting to create an index on any other column results in an error. The ARCHIVE storage engine produces special-purpose tables that store large amounts of unindexed data in a very small footprint. To enable this storage engine if you build MySQL ...
https://dev.mysql.com/doc/refman/8.0/en/batch-mode.html
If you want the script to continue even if some of the statements in it produce errors, you should use the --force command-line option. Just edit your script to correct the error, then tell mysql to execute it again. In the previous sections, you ...