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https://dev.mysql.com/doc/internals/en/ensuring-compatibility-of-future-binary-log-versions.html
However, as indicated earlier, v1-format files can be recognized from the initial event in the file, by a type code of START_EVENT_V3 and an event length less than 75. The v4 format description event is designed so that it can handle future format ...
https://dev.mysql.com/doc/internals/en/error-message-marking-obsolete.html
Beginning with MySQL 8.0, it is possible to mark an error message obsolete. This should be done only for messages that no longer used in the server code. The following procedure shows how to do this, using the ER_HASHCHK error as an example. Find ...
https://dev.mysql.com/doc/internals/en/event-class-archaeological-notes.html
Despite the "V3" in the type code name, START_EVENT_V3 currently is used as the type code not only for v3 start events, but also for v1 start events. The original symbol for type code 1 was START_EVENT in the format now known as v1. Later, when v3 ...
https://dev.mysql.com/doc/internals/en/event-content-writing-conventions.html
Event contents are written using these conventions: Numbers are written in little-endian format (least significant byte first), unless otherwise indicated. Values that represent positions or lengths are given in bytes and should be considered ...
https://dev.mysql.com/doc/internals/en/event-flags.html
Event headers for v3 format and up contain event flags in the two flag bytes at position FLAGS_OFFSET = 17. There are comments about these flags in log_event.h, in addition to the remarks in this section. Current event flags: ...
https://dev.mysql.com/doc/internals/en/external-lock.html
Synopsis virtual int external_lock ( thd, lock_type); THD * thd ; int lock_type ; Description This is the external_lock method. The locking methods for mysql section in lock.cc has additional comments on this topic that may be useful to read. If you ...
https://dev.mysql.com/doc/internals/en/flush-tables.html
The idea of FLUSH TABLES is to force all tables to be closed. This is mainly to ensure that if someone adds a new table outside of MySQL (for example, by copying files into a database directory with cp), all threads will start using the new table.
https://dev.mysql.com/doc/internals/en/guided-tour-majordir-client.html
There are other utilities too in fact, you'll find the source of most client-side programs here. There are also programs for checking the password, and for testing that basic functions such as threading or access via SSL are possible. You'll notice, ...
https://dev.mysql.com/doc/internals/en/guided-tour-majordir-mysys.html
The next major directory is labelled mysys, which stands for MySQL System Library. This is the toolbox directory, for example it has low level routines for file access. The .c files in mysys have procedures and functions that are handy for calling ...
https://dev.mysql.com/doc/internals/en/guided-tour-osdir.html
We're now getting into the directories which aren't “major.” Starting with: dbug pstack regex strings zlib Now it's time to reveal a startling fact, which is we didn't write all of the source code in all of the source code directories all by ...