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https://dev.mysql.com/doc/internals/en/error-message-adding.html
The procedure for adding error messages depends on which version of MySQL you are using: Before MySQL 5.0.3, error messages are stored in errmsg.txt files in the language directories under sql/share. That is, the files have names like ...
https://dev.mysql.com/doc/internals/en/guided-tour-flow.html
The flow works like this: First, the client routines get an SQL statement from a user, allowing edit, performing initial checks, and so on. Then, via the vio routines, the somewhat-massaged statement goes off to the server. Next, the sql routines ...
https://dev.mysql.com/doc/internals/en/libmysql-r-directory.html
There is only one file here, used to build a thread-safe libmysql library: makefile.am .
https://dev.mysql.com/doc/internals/en/optimizer-joins-access-methods.html
The cost of a plan reflects roughly the resources needed to compute a query according to the plan, where the main factor is the number of rows that will be accessed while computing a query. The optimizer first considers all plans for one table, then ... Bad join choices can cause more damage than bad choices in single-table searches, so MySQL developers have spent proportionally more time making sure that the tables in a query are joined in an optimal order and that optimal access methods (often called access paths) are chosen to retrieve table ...
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/predefined-option-sets.html
Assuming that we want to include the embedded library and exclude the ARCHIVE storage engine from the build, this script could look like this: SET(WITH_EMBEDDED_SERVER 1 CACHE BOOL "") SET(WITHOUT_ARCHIVE_STORAGE_ENGINE 1 CACHE BOOL "") Currently, ... It might be handy to specify a predefined set of options and do some compiler flag adjustments by passing just a single option to ...
https://dev.mysql.com/doc/internals/en/prepared-stored.html
When executing a query in conventional mode, the server sequentially parses its text, acquires table level locks, analyzes the parsed tree, builds an execution plan, executes the built plan and releases the locks. Let us start with a general ...
https://dev.mysql.com/doc/internals/en/troubleshooting-platform-checks.html
If you suspect that a platform check returned wrong result, examine CMakeFiles/CMakeError.log and CMakeFiles/CMakeOutput.log under the build directory.
https://dev.mysql.com/doc/internals/en/x-protocol-lifecycle-lifecycle.html
On a higher level they build a sequence of Messages with a initial and final Message. Topics in this section: Connection Session Stages of Session Setup Authentication Pipelining Max Message Length Extensions The following list describes some of ...