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https://dev.mysql.com/doc/internals/en/optimizer-trace-implementation.html
A trace is started by creating an instance of Opt_trace_start; information is added to this trace by creating instances of Opt_trace_object and Opt_trace_array, and by using the add() functions of those classes...
https://dev.mysql.com/doc/internals/en/sending-more-than-16mbyte.html
If the payload is larger than or equal to 224−1 bytes the length is set to 224−1 (ff ff ff) and additional packets are sent with the rest of the payload until the payload of a packet is less than 224−1 bytes. Sending a payload of 16 777 215 ...
https://dev.mysql.com/doc/internals/en/supporting-transactions.html
This section documents the methods that must be implemented to add support for transactions to a storage engine. Please note that transaction management can be complicated and involve methods such as row versioning and redo logs, which is beyond ...
https://dev.mysql.com/doc/internals/en/variation-of-storage-engine.html
Checks of the INFORMATION_SCHEMA The storage engines to be used for information_schema tables are hardcoded. Therefore tests focussed on permissions, optimizer strategies, column data types etc. when selecting on INFORMATION_SCHEMA tables should ...
https://dev.mysql.com/doc/ndbapi/en/overview-ndb-transaction-scanning.html
Abstract This section discusses the high-level architecture of the NDB API, and introduces the NDB classes which are of greatest use and interest to the developer. It also covers most important NDB API concepts, including a review of NDB Cluster ...
MySQL 8.4 Reference Manual :: A.11 MySQL 8.4 FAQ: MySQL Chinese, Japanese, and Korean Character Sets
https://dev.mysql.com/doc/refman/8.4/en/faqs-cjk.html
Sometimes people try to insert gbk characters into gb2312, and it works most of the time because gbk is a superset of gb2312. Why do I get Incorrect string value error messages? To see the problem, create a table with one Unicode (ucs2) column and ... This set of Frequently Asked Questions derives from the experience of MySQL's Support and Development groups in handling many inquiries about CJK (Chinese-Japanese-Korean) ...
https://dev.mysql.com/doc/connector-net/en/connector-net-programming-tracing-mysql.html
The switch level in this case is set to Verbose to display the maximum amount of information. The second number displayed in the trace message is the connection count. 12 Warning: level, code, message 13 Error: error number, error message Although ... This section describes how to set up your application to view MySQL trace ...
https://dev.mysql.com/doc/relnotes/connector-cpp/en/news-8-0-17.html
(WL #13133) Configuration Notes The maximum permitted length of host names throughout Connector/C++ has been raised to 255 ASCII characters, up from the previous limit of 60 characters. Applications that expect host names to be a maximum of 60 ...
https://dev.mysql.com/doc/heatwave/en/mys-hw-bulk-load-mysql-server.html
Stored generated columns can be part of secondary indexes and the primary key. Use a second session to monitor bulk load progress: If the data is sorted, there is a single stage: loading. MySQL includes a bulk load extension to the LOAD DATA ...
https://dev.mysql.com/doc/refman/8.4/en/problems-with-null.html
For example, the following statements are completely different: mysql> INSERT INTO my_table (phone) VALUES (NULL); mysql> INSERT INTO my_table (phone) VALUES (''); Both statements insert a value into the phone column, but the first inserts a NULL ...