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https://dev.mysql.com/doc/internals/en/negative-tests.html
A "negative" test is a test for which you expect to see a failure. If an error does not occur, that itself indicates a problem. DO NOT FORGET "NEGATIVE" TESTS where we expect to see fine error messages from the server. This section contains just a ...
https://dev.mysql.com/doc/internals/en/optimizer-index-join-type.html
An index which is used this way is called a covering index in most texts. Consider this query: SELECT column1 FROM Table1; If column1 is indexed, then the optimizer may choose to retrieve the values from the index rather than from the table. For ...
https://dev.mysql.com/doc/internals/en/optimizer-joins-access-methods.html
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 ...
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. During context analysis phase, ...
https://dev.mysql.com/doc/internals/en/source-files-related-to-the-binary-log.html
client directory: mysqlbinlog.cc : The source for the mysqlbinlog utility that reads binary log files and displays them in text format. This section describes the files in a MySQL source tree that are most relevent to binary log processing. sql ...
https://dev.mysql.com/doc/internals/en/sql-directory.html
Programs for handling SQL commands. The "core" of MySQL. These are the .c and .cc files in the sql directory: derror.cc --- read language-dependent message file des_key_file.cc --- load DES keys from plaintext file discover.cc --- Functions for ...
https://dev.mysql.com/doc/internals/en/strings-directory.html
Many of the files in this subdirectory are equivalent to well-known functions that appear in most C string libraries. On the other hand, some of the files are MySQL additions or improvements. Often the MySQL changes are attempts to optimize the ...
https://dev.mysql.com/doc/internals/en/test-execution-hanging.html
Symptom: No text flooding through the command window where a test is running. Run this command in a different window: tail -f <var_dir>/mysqld.1/data/mysql/general_log.CSV If you see some changes, your test is alive.
https://dev.mysql.com/doc/internals/en/x-protocol-notices-notices.html
Global Notices Global Notices are sent by the server in case of events happen that are unrelated to the currently active message sequence: server is shutting down node disconnected from group schema or table dropped binlog events Server Shutting ...
https://dev.mysql.com/doc/mysqld-version-reference/en/keywords-5-7.html
This section provides information about keywords and reserved words in MySQL 5.7. MySQL 5.7 Keywords and Reserved Words MySQL 5.7 New Keywords and Reserved Words MySQL 5.7 Removed Keywords and Reserved Words MySQL 5.7 Keywords and Reserved Words ...