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https://dev.mysql.com/doc/extending-mysql/8.4/en/adding-loadable-function.html
If you want to use a loadable function that needs to access symbols from mysqld (for example, the metaphone function in sql/udf_example.cc uses default_charset_info), you must link the program with -rdynamic (see man dlopen). When an SQL statement ... The MySQL interface for loadable functions provides the following features and capabilities: Functions can return string, integer, or real values and can accept arguments of those same ...
https://dev.mysql.com/doc/mysql-installer/en/mysql-installer-workflow-nonserver-products.html
Classic MySQL protocol connections to InnoDB Cluster Read/Write: Set the first base port number to one that is unused (between 80 and 65532) and the wizard will select the remaining ports for you. After configuring MySQL Router, the root account ...
https://dev.mysql.com/doc/relnotes/connector-cpp/en/news-8-0-13.html
The following examples set the connection timeout to 10 milliseconds: X DevAPI examples: Session sess("user@host/db?connect-timoeut=10"); Session sess(..., SessionOption::CONNECT_TIMEOUT, 10, ...); Session sess( ..., SessionOption::CONNECT_TIMEOUT, ...Connections to the server made using X DevAPI or X DevAPI for C continue to use the connection character set determined by the ...
https://dev.mysql.com/doc/relnotes/mysql-cluster/8.4/en/news-8-4-4.html
This fix also adds a warning to inform API users that deleting g_eventLogger before calling the Ndb_cluster_connection destructor is incorrect usage. (Bug #37162636) Improved variable names used in start_resend(), and enhanced related debug messages ...Handling of DBTC and API state alignment errors has been improved by this set of fixes, as well as scan protocol timeout handling in DBSPJ; now, when such misalignments in state are detected, the involved API nodes are disconnected rather than the data node detecting it being forced to shut ...
https://dev.mysql.com/doc/mysql-em-plugin/en/myoem-compliance-security-standard-rules.html
Such a server could access any file on the client host to which the client user has read access. In a Web environment where the clients are connecting from a separate web server, a user could use LOAD DATA LOCAL to read any files that the web server ...Consider whether the filtering of events by account is required, and remove the configuration values for audit_log_exclude_accounts or audit_log_include_accounts if ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-replication-auto-sync.html
#!/user/bin/perl -w # file: reset-replica.pl # Copyright (c) 2005, 2020, Oracle and/or its affiliates. The following Perl script reset-replica.pl serves as an example of how you can do this. # This program is distributed in the hope that it will be ... It is possible to automate much of the process described in the previous section (see Section 25.7.9, “NDB Cluster Backups With NDB Cluster ...
https://dev.mysql.com/doc/internals/en/optimizer-partition-pruning.html
Walk the graph, and find sets of partitions (or subpartitions, if necessary) to be used for each interval in the graph. For example, if col1=const1 were missing from the example WHERE clause, then we would not be able to calculate the partitioning ...Partitions that did not get into this set (that is, those that were pruned away) will not be accessed at all: this is how query execution is made ...
https://dev.mysql.com/doc/mysql-shell/9.4/en/admin-api-tagging.html
A configurable tag framework is available to allow the metadata of InnoDB Cluster, InnoDB ClusterSet, or InnoDB ReplicaSet to be marked with additional information. Setting Tags on a Cluster Instance You can set tags at the instance level, which ...
https://dev.mysql.com/doc/refman/8.4/en/innodb-doublewrite-buffer.html
With this setting, the doublewrite buffer is fully enabled, with database page content written to the doublewrite buffer where it is accessed during recovery to fix incomplete page writes. This lightweight setting is intended for detecting ... The ...If there is an operating system, storage subsystem, or unexpected mysqld process exit in the middle of a page write, InnoDB can find a good copy of the page from the doublewrite buffer during crash ...
https://dev.mysql.com/doc/connectors/en/connector-j-connp-props-performance-extensions.html
Even if this property is set to "false", the driver will do its best effort to prevent the execution of database-state-changing queries. callableStmtCacheSize If 'cacheCallableStmts' is enabled, how many callable statements should be cached? ...