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https://dev.mysql.com/doc/internals/en/required-server-code-patches.html
The build system is not too clever about creating these symlinks for files added after the first compile ... Currently procedures can only be compiled into the server staticly. There is no dynamic procedure for loading them dynamicly yet like we ...
https://dev.mysql.com/doc/internals/en/ndb-directory.html
We generally use the term "ndb" when referring to the storage engine, and the term "MySQL Cluster" when referring to the combination of the storage engine and the rest of the MySQL facilities.
https://dev.mysql.com/doc/internals/en/calling-sequence.html
For grouping queries add() is called once for each source row. The init callback is always called first at the beginning of a query, followed by a call to the Section 18.1.2, “change_columns()”. The Section 18.1.6, “end_of_records()” member ...
https://dev.mysql.com/doc/internals/en/charsets.html
See mysql_com.h for types */ } MYSQL_FIELD; Character set and collation information are specific to a server version and installation, and are generated automatically from the sql/share/charsets/Index.xml file in the source distribution. Character ...
https://dev.mysql.com/doc/internals/en/class-procedure-add.html
Prototype: virtual void add(void); This member function is called once for every source row for a GROUP BY query.
https://dev.mysql.com/doc/internals/en/class-procedure-end-group.html
Prototype: virtual void end_group(void); This member function is called whenever the end of a group in a GROUP BY is detected, it is called after the call to add() for the last source row in the group but before sending the actual aggregated result ...
https://dev.mysql.com/doc/internals/en/client-directory.html
The client library includes mysql.cc (the source of the mysql executable) and other utilities. Most of the utilities are mentioned in the MySQL Reference Manual. Generally these are standalone C programs which one runs in "client mode", that is, ...
https://dev.mysql.com/doc/internals/en/cmake-macro-defining-plugin.html
To define a plugin, you need to add the MYSQL_ADD_PLUGIN() macro into CMakeList.txt. If you need to perform system checks, use standard CMake techniques like CHECK_FUNCTION_EXISTS or CHECK_INCLUDE_FILE etc. For example, ...
https://dev.mysql.com/doc/internals/en/compressed-payload.html
The header of the compressed packet has the parameters of the uncompress() function in mind: ZEXTERN int ZEXPORT uncompress OF((Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen)); The payload can be anything from a piece of a MySQL ... If the length of payload before compression is more than 0 the Compressed Packet header is followed by the compressed ...
https://dev.mysql.com/doc/internals/en/dbug-sleep.html
In cases where the normal server code does not have a block point at the critical place, one can insert an artificial synchronization point. open_tables(...) DBUG_EXECUTE_IF("sleep_open_and_lock_after_open", { const char *old_proc_info= ...