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https://dev.mysql.com/doc/internals/en/dbug-sleep.html
It says that the next statement can either succeed (0) or fail (ER_UNKNOWN_SYSTEM_VARIABLE). In cases where the normal server code does not have a block point at the critical place, one can insert an artificial synchronization point.
https://dev.mysql.com/doc/internals/en/debug-sync-facility.html
MySQL supports a Debug Sync Facility, which - in spite of the "debug" in its name - is completely independent from the DBUG facility (except that it uses DBUG to trace its operation, if DBUG is also configured in the server). The documentation here ...
https://dev.mysql.com/doc/internals/en/debug-sync-implementation.html
The SET DEBUG_SYNC statement adds a requested action to the array or overwrites an existing action for the same synchronization point. Pseudo code for a synchronization point: #define DEBUG_SYNC(thd, sync_point_name) if ...
https://dev.mysql.com/doc/internals/en/error-messages-storage-engine.html
To add error messages for table handlers, the following example may be helpful. Purpose: Implement the handler::get_error_message function as ha_federated::get_error_message to return the handler-specific error message. When you have returned the ...
https://dev.mysql.com/doc/internals/en/floating-point-types.html
This document was created when http://bugs.mysql.com/4457 (Different results in SQL-Statements for the same record) was fixed at the end of August 2004. The MySQL Reference Manual has a discussion of floating-point numbers in Section 11.2 Numeric ...
https://dev.mysql.com/doc/internals/en/formal-stuff.html
Section 26.1.1, “Coding Style” Section 26.1.2, “SQL Statement Example” Section 26.1.4, “Header of Scripts” .
https://dev.mysql.com/doc/internals/en/guided-tour-chunk.html
} Here's a snippet of code from a .c file in the sql directory, specifically from sql_update.cc, which as we mentioned earlier -- is invoked when there's an UPDATE statement to process. Now, having finished with our bird's eye view of the source ...
https://dev.mysql.com/doc/internals/en/header-example.html
########### suite/funcs_1/t/processlist_val_no_prot.test ############# # # # Testing of values within INFORMATION_SCHEMA.PROCESSLIST # # # # The prepared statement variant of this test is # # suite/funcs_1/t/processlist_val_ps.test. # # # # There ...
https://dev.mysql.com/doc/internals/en/implementing-info-method.html
The stats member is an instance of the ha_statistics class which is also defined in handler.h In addition to being used by the optimizer, many of the values set during a call to the info() method are also used for the SHOW TABLE STATUS statement.
https://dev.mysql.com/doc/internals/en/implementing-rnd-next-method.html
In each format, the columns appear in the order in which they were defined by the CREATE TABLE statement. After the table is initialized, the MySQL server will call the handler's [custom-engine.html#custom-engine-api-reference-rnd_next rnd_next()] ...