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https://dev.mysql.com/doc/internals/en/innodb-fil-header.html
-------- - root - -------- | ---------------------- | | | | -------- -------- - leaf - <--> - leaf - -------- -------- Everyone has seen a B-tree and knows that the entries in the root page point to the leaf pages. (I indicate those pointers with ...
https://dev.mysql.com/doc/internals/en/innodb-overview.html
An Important Note About The Word "Origin" The "Origin" or "Zero Point" of a record is the first byte of the Field Contents --- not the first byte of the Field Start Offsets. If there is a pointer to a record, that pointer is pointing to the Origin.
https://dev.mysql.com/doc/internals/en/myisam-concurrent-insert.html
To support concurrent inserts, every statement starts with copying MYISAM_SHARE::state.state to MI_INFO::save_state and lets MI_INFO::state point to the copy. The copy back is done in mi_update_status(), which is called from mi_lock_database() when ...
https://dev.mysql.com/doc/internals/en/myisam-introduction.html
The important ones are "the actual length", "the unused length", and "the overflow pointer". The overflow pointer is the location of the rest of the record if there are multiple parts. The main differences are: BLOB values have a length and a memory ...MySQL creates files named Table1.MYD ("MySQL Data"), Table1.MYI ("MySQL Index"), and Table1.frm ...
https://dev.mysql.com/doc/internals/en/mysys-directory.html
There are 125 *.c programs in this directory: array.c --- Dynamic array handling charset.c --- Using dynamic character sets, set default character set, ... For example, the main functions in my_getwd.c are described thus: "int my_getwd _A((string ...
https://dev.mysql.com/doc/internals/en/select-structure.html
At the time of creating or performing any JOIN::* operation, LEX::current_select points to an appropriate SELECT_LEX. Only during parsing of global ORDER BY and LIMIT clauses (for the whole UNION), LEX::current_select points to SELECT_LEX_UNIT of ...
https://dev.mysql.com/doc/internals/en/stability-checks-for-random-timing-problems.html
--repeat=<number> <your test> Several test runs, use a "slow" disk based filesystem rmdir var # "var" must not be a symlink pointing into a RAM based filesystem ./mysql-test-run.pl .... Examples: all OS: Compile a MySQL version from source Unix ...
https://dev.mysql.com/doc/internals/en/unsafe-statements.html
We do not mark such function unsafe, because we only support replication between platforms that use identical floating point math. NOTE: the following list is incomplete; it does not take into account changes made in 2010 or later (roughly). An ...
MySQL NDB Cluster API Developer Guide :: 4.2.2.5 ClusterJ Mappings Between MySQL and Java Data Types
https://dev.mysql.com/doc/ndbapi/en/mccj-using-clusterj-mappings.html
Where Unix represents a point in time as a 32-bit signed number of seconds since the Unix Epoch (01 January 1970), Java uses a 64-bit signed number of milliseconds since the Epoch. ClusterJ provides mappings for all of the common MySQL database ...
https://dev.mysql.com/doc/ndbapi/en/mccj-using-clusterj-start.html
When executing a ClusterJ application, you must set the classpath to point to these files. In addition, you must set java.library.path variable to point to the directory containing the Cluster ndbclient library, normally found in lib/mysql (also in ... In this section, we discuss how to start ClusterJ applications and the ClusterJ application ...