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https://dev.mysql.com/doc/internals/en/frm-file-format.html
Regardless of the storage engine you choose, every MySQL table you create is represented on disk by a .frm file that describes the table's format (that is, the table definition). The file bears the same name as the table, with an .frm extension.
https://dev.mysql.com/doc/internals/en/info.html
Synopsis virtual int info ( flag); uint flag ; Description This is the info method. Currently, this table handler doesn't implement most of the fields really needed. SHOW also makes use of this data Another note, you will probably want to have the ...
https://dev.mysql.com/doc/internals/en/mysql-packet.html
If a MySQL client or server wants to send data, it: Splits the data into packets of size (224−1) bytes Prepends to each chunk a packet header Protocol::Packet Data between client and server is exchanged in packets of max 16MByte size. The number ...
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/optimizer-and-relations.html
An ANDed search has the form condition1 AND condition2, as in this example: WHERE column1 = 'x' AND column2 = 'y' Here, the optimizer's decision process can be described as follows: If (neither condition is indexed) use sequential scan. Otherwise, ...
https://dev.mysql.com/doc/internals/en/optimizer-partition-pruning.html
Partitions that did not get into this set (that is, those that were pruned away) will not be accessed at all: this is how query execution is made faster. With non-transactional tables such as MyISAM, locks are placed on entire partitioned table. It ...
https://dev.mysql.com/doc/internals/en/packet-ERR_Packet.html
This packet signals that an error occurred. It contains a SQL state value if CLIENT_PROTOCOL_41 is enabled. Payload Type Name Description int<1> header [ff] header of the ERR packet int<2> error_code error-code if capabilities & CLIENT_PROTOCOL_41 ...
https://dev.mysql.com/doc/internals/en/rnd-init.html
Synopsis virtual int rnd_init (scan); bool scan ; Description This is the rnd_init method. rnd_init() is called when the system wants the storage engine to do a table scan. Unlike index_init(), rnd_init() can be called two times without rnd_end() in ...
https://dev.mysql.com/doc/ndbapi/en/mccj-clusterj-_query.html
A Query instance represents a specific query with bound parameters. Table 4.37 deletePersistentAll() Parameter Description return the number of instances deleted 4.3.1.19.9 execute(Map<String, ?>) public abstract Results<E> execute(Map<String, ?> ...
https://dev.mysql.com/doc/ndbapi/en/mccj-clusterj-connection.html
Connection represents a shared cluster connection from the global connection pool. 4.3.1.13.1 Synopsis public interface Connection {// Public Methods public abstract State currentState(); public abstract int nodeId(); public abstract String ...