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https://dev.mysql.com/doc/internals/en/implementing-the-rnd-next-method.html
As with the index_read() method, the storage engine must return the row that matches the key according to the find_flag and set a cursor for future reads.
https://dev.mysql.com/doc/internals/en/in-memory-record-layout.html
null bits: One bit per column that can be NULL. The "null bits" are rounded up to the next byte boundary. Length (pack_length) and layout of the fields depend on the field type: -- to be added -- Note: The "in-memory record layout" is used by the ...
https://dev.mysql.com/doc/internals/en/innodb-infimum-and-supremum-records.html
“Infimum” and “Supremum” are mathematical terms that refer to the outer bounds of an ordered set. An infimum is Greatest Lower Bound (GLB), so it is lower than the lowest possible key value. A supremum is the Least Upper Bound (LUB), so it ...
https://dev.mysql.com/doc/internals/en/innodb-more-information.html
References: The most relevant InnoDB source-code files are rem0rec.c, rem0rec.ic, and rem0rec.h in the rem ("Record Manager") directory.
https://dev.mysql.com/doc/internals/en/innodb-more-page-information.html
References: The most relevant InnoDB source-code files are page0page.c, page0page.ic, and page0page.h in the page directory.
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/mysqld-variables-within-plugin.html
Information about this is in the Server Plugin Status and System Variables section of the MySQL Reference Manual.
https://dev.mysql.com/doc/internals/en/optimizer-definitions.html
This description uses a narrow definition: The optimizer is the set of routines which decide what execution path the DBMS should take for queries. MySQL changes these routines frequently, so you should compare what is said here with what's in the ...
https://dev.mysql.com/doc/internals/en/os-directory.html
The files in this directory are the product of the efforts of three people from outside MySQL: Yuri Dario, Timo Maier, and John M Alfredsson.
https://dev.mysql.com/doc/internals/en/prepared-stored-statement-execution.html
In order to call mysql_execute_command (the function that executes a statement) for a prepared statement and not damage its parse tree, we backup and restore the active Query_arena of THD. We don't want the garbage created during execution to be ...