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https://dev.mysql.com/doc/internals/en/libmysqld-directory.html
The program files on this directory are: libmysqld.c --- The called side, compare the mysqld.exe source lib_sql.c --- Emulate the vio directory's communication buffer . The product of libmysqld is not a client/server affair, but a library.
https://dev.mysql.com/doc/internals/en/myisam-directory.html
They are: mi_cache.c --- for reading records from a cache mi_changed.c --- a single routine for setting a "changed" flag (very short) mi_check.c --- for checking and repairing tables. Can be used to exactly replay a set of changes to a table.
https://dev.mysql.com/doc/internals/en/myisam-more-information.html
References: Most of the formatting work for MyISAM columns is visible in the program /sql/field.cc in the source code directory. And in the MyISAM directory, the files that do formatting work for different record formats are: /myisam/mi_statrec.c, ...
https://dev.mysql.com/doc/internals/en/optimizer-code-concepts.html
This section discusses key optimizer concepts, terminology, and how these are reflected in the MySQL server source code.
https://dev.mysql.com/doc/internals/en/optimizer-definitions.html
MySQL changes these routines frequently, so you should compare what is said here with what's in the current source code. This description uses a narrow definition: The optimizer is the set of routines which decide what execution path the DBMS ...
https://dev.mysql.com/doc/internals/en/overview.html
The MySQL protocol is used between MySQL Clients and a MySQL Server.
https://dev.mysql.com/doc/internals/en/replication-correct.html
(rpl-type-promotion) The data type of a column differs as allowed in Replication with Differing Table Definitions on Source and Replica. In addition to what we guarantee in (P-rpl-correct), we also guarantee correct replication in the following ...
https://dev.mysql.com/doc/internals/en/replication-organization.html
In the next section, we list the source code files used by replication and describe what each file contains. We distinguish between two levels of the architecture: principles, and rules: principle High-level goal that declares how the program shall ...
https://dev.mysql.com/doc/internals/en/sql-directory.html
Programs for handling SQL commands. The "core" of MySQL. These are the .c and .cc files in the sql directory: derror.cc --- read language-dependent message file des_key_file.cc --- load DES keys from plaintext file discover.cc --- Functions for ...
https://dev.mysql.com/doc/internals/en/wait-condition.html
Like 'sleep', this method can also be used, when all but one thread reach a blocked state. If you are able to detect that the threads are in their blocked state by using SQL statements, then you can use this method. The remaining thread runs the ...