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https://dev.mysql.com/doc/internals/en/optimizer-range-join-type.html
The optimizer will use an index (range search) for column1 LIKE 'x%' but not for column1 LIKE '%x' That is, there is no range search if the first character in the pattern is a wildcard. To the optimizer, column1 BETWEEN 5 AND 7 is the same as this ... Some conditions can work with indexes, but over a (possibly wide) range of ...
https://dev.mysql.com/doc/connectors/en/connector-j-usagenotes-spring-config.html
This article will focus on Java-oriented access to MySQL databases with Spring 2.0. This is one of the main benefits and the foundation for Spring's resource and transaction management. For the examples in this section the MySQL world sample ... The ...
https://dev.mysql.com/doc/connectors/en/connector-net-tutorials-ssl-pfx.html
For the purposes of this example, use test client certificates from the MySQL server repository (./mysql-test/std_data). To complete the steps in this tutorial for PFX certificates, you must have Open SSL installed. This can be downloaded for ...
https://dev.mysql.com/doc/connector-net/en/connector-net-tutorials-ssl-pfx.html
For the purposes of this example, use test client certificates from the MySQL server repository (./mysql-test/std_data). To complete the steps in this tutorial for PFX certificates, you must have Open SSL installed. This can be downloaded for ...
https://dev.mysql.com/doc/internals/en/debug-sync-point.html
open_tables(...) DBUG_SYNC_POINT("debug_lock.after_open_tables", 10); lock_tables(...) The synchronization points behave similar to RELEASE_LOCK(<whatever the thread has>); IS_FREE_LOCK(str) OR (GET_LOCK(str,timeout) AND RELEASE_LOCK(str)) This ...
https://dev.mysql.com/doc/internals/en/error-message-multiple-versions.html
This will ensure that the error code value is the same in GA and all later versions. This will have the side effect that any error codes which are not in GA will change their values in post-GA versions. Instead, use the ER_UNKNOWN_ERROR error code, ... It is critical that error codes are identical in all ...
https://dev.mysql.com/doc/internals/en/error-messages-5-0-3-higher.html
The grammar of the errmsg.txt file looks like this: languages langspec [, langspec] ... A language specification langspec in the languages line has this syntax: langspec: langname=langcodelangcharset langname is the long language name, langcode is ... The file you edit to add a new error message depends on your version of MySQL: MySQL 5.0.3 up to 5.5: Edit errmsg.txt MySQL 5.5 and up: Edit errmsg-utf8.txt In either case, comp_err generates the header files automatically during the MySQL build ...
https://dev.mysql.com/doc/internals/en/select-union.html
We will need this object to store in every JOIN structure link on it, but we have not (yet) temporary table structure. Merging types of result fields and storing them in special Items (Item_type_holder) will be done in this loop, too. Result of this ...Allocate JOIN structures and execute JOIN::prepare() for every SELECT to get full information about types of elements of SELECT list ...
https://dev.mysql.com/doc/internals/en/x-protocol-messages-messages.html
Topics in this section: Message Structure Message Sequence Common Messages Connection Session Expectations CRUD SQL Result Sets Expressions Data Types This section provides detailed information about how X Protocol defines messages. Figure 15.12 ...
https://dev.mysql.com/doc/ndbapi/en/mgm-functions-cluster-log.html
This section provides information about the functions available in the MGM API for controlling the output of the cluster log. ndb_mgm_get_clusterlog_severity_filter() ndb_mgm_set_clusterlog_severity_filter() ndb_mgm_get_clusterlog_loglevel() ...