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https://dev.mysql.com/doc/internals/en/select-select-result.html
send_error is used mainly for error interception, making some operation and then ::send_error will be called. This class has a very important role in SELECT performance with select_result class and classes inherited from it (usually called with a ...
https://dev.mysql.com/doc/internals/en/select-subquery.html
There are two types of them: select_singlerow_subselect , to store values of given rows in Item_singlerow_subselect cache on send_data() call, and report error if Item_subselect has 'assigned' attribute. In expressions, subqueries (that is, ...
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/test-faults.html
In particular, one needs to know if servers will either correctly recover or print out appropriate error messages thus avoiding unexpected problems in a production environment. Status of this section: up to date 2010-09-08 The assessment of the ...
https://dev.mysql.com/doc/internals/en/test-synchronization.html
In this chapter I'll describe some synchronization mechanisms: Sleep Wait Condition Dbug Sleep Error Injection User-Level Locks Debug Sync Point Backup Breakpoint Debug Sync Facility . There is a class of problems that require two or more ...
https://dev.mysql.com/doc/internals/en/transformation-scalar-in.html
To rewrite a scalar IN subquery, the Item_in_subselect::single_value_transformer method is used. The scalar IN subquery will be replaced with an Item_in_optimizer item. On a value request (one of val, val_int, or val_str methods) it evaluates the ...
https://dev.mysql.com/doc/internals/en/user-level-locks.html
--error ER_LOCK_WAIT_TIMEOUT reap; # Now let conn1 get the lock and continue. User-level locks are controlled with the SQL functions GET_LOCK(str,timeout) IS_FREE_LOCK(str) IS_USED_LOCK(str) RELEASE_LOCK(str) They can be used at places where SQL ...
https://dev.mysql.com/doc/internals/en/x-protocol-authentication-authentication.html
S: AuthenticateOk authzid empty authcid user name challenge server side, one time random challenge response HEX(SHA1(password) ^ SHA1(challenge + SHA1(SHA1(password)))) Figure 15.7 MYSQL41 Authentication Image description .
https://dev.mysql.com/doc/internals/en/x-protocol-xplugin-implementation-of-the-x-protocol.html
Mysqlx.Sql::StmtExecute StmtExecute implements several namespaces: sql The SQL interface which expects: .stmt to be a string that the MySQL SQL parser understands Note As the SQL parser for non prepared statements doesn't understand wildcards, ...
https://dev.mysql.com/doc/mysql-installer/en/mysql-installer-change-path-proc.html
Note Starting with MySQL Installer 1.4.39, if you move the data directory of an installed server manually, MySQL Installer identifies the change and can process a reconfiguration operation without errors. You can change the default installation ...