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https://dev.mysql.com/doc/internals/en/query-event.html
Post-header 4 slave_proxy_id 4 execution time 1 schema length 2 error-code if binlog-version ≥ 4: 2 status-vars length Payload string[$len] status-vars string[$len] schema 1 [00] string[EOF] query Fields status_vars_length (2) -- number of bytes ... Binlog::QUERY_EVENT: The query event is used to send text querys right the ...
https://dev.mysql.com/doc/internals/en/replication-source-code-files.html
rpl_reporting.h/.cc Utilities for reporting replication conditions and reporting errors, warnings, and informational messages on the slave. Status of this section: up to date 2009-12-16 Files in the sql directory: File Description slave.h/.cc ...
https://dev.mysql.com/doc/internals/en/rule-exceptions.html
Prerequisites checks Section 26.3.1, “Error Masking” Section 26.3.2, “Use of the Option --disable_abort_on_error” Section 26.3.3, “Perfect Cleanup at the End of a Test” Section 26.3.4, “Use of OS-Specific Commands” .
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 ...