Search Results
https://dev.mysql.com/doc/refman/8.4/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/8.4/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/8.4/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/8.4/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/extending-mysql/8.4/en/introduction.html
This document describes what you need to know when working on the MySQL 8.4 code. Feel free to ask questions about the code and to send patches that you would like to contribute to the MySQL project! Note The MySQL source code contains internal ...
https://dev.mysql.com/doc/extending-mysql/8.4/en/mysql-test-suite.html
The test system that is included in Unix source and binary distributions makes it possible for users and developers to perform regression tests on the MySQL code. The current set of test cases does not test everything in MySQL, but it should catch ...For information, including system requirements, see The MySQL Test Framework in the MySQL Server Doxygen documentation, available at ...
https://dev.mysql.com/doc/extending-mysql/8.4/en/writing-plugins-overview.html
These conditions apply to plugin writing: MySQL header files used by plugins contain C++ code, so plugins must be compiled as C++ code. You must compile plugins with the entire server source code present, not just the libraries and header files.
https://dev.mysql.com/doc/mysql-shell/9.4/en/mysql-shell-extension-objects-persist.html
A script to define and register extension objects must have a file extension of .js for JavaScript code, or .py for Python code, to match the language used for the script. A plugin can only contain code in one language, so if you are creating an ...
https://dev.mysql.com/doc/ndbapi/en/ndb-ndbeventoperation.html
NdbEventOperation Class Overview NdbEventOperation::clearError() (DEPRECATED) NdbEventOperation::execute() NdbEventOperation::getBlobHandle() NdbEventOperation::getEpoch() NdbEventOperation::getEventType() (DEPRECATED) ... This section provides ...
https://dev.mysql.com/doc/relnotes/mysql-router/8.4/en/news-8-2-0.html
An error similar to the following was returned: Error: Master key for keyring at '/bootstrapPath/data/keyring' could not be read (Bug #35630329) Under certain circumstances, MySQL Router did not shutdown when closed with SIGTERM or SIGINT. As of ...