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https://dev.mysql.com/doc/refman/5.7/en/create-function-loadable.html
The AGGREGATE keyword, if given, signifies that the function is an aggregate (group) function. CREATE [AGGREGATE] FUNCTION function_name RETURNS {STRING|INTEGER|REAL|DECIMAL} SONAME shared_library_name This statement loads the loadable function ...
https://dev.mysql.com/doc/refman/5.7/en/file-permissions.html
For example, to give group access to all new directories, start mysqld_safe as follows: UMASK_DIR=504 # = 770 in octal export UMASK_DIR mysqld_safe & For additional details, see Section 4.9, “Environment Variables”. If you have problems with ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-online-ddl-single-multi.html
Operations all using the same specific LOCK clause, that you want to either succeed or fail as a group. Before the introduction of online DDL, it was common practice to combine many DDL operations into a single ALTER TABLE statement. Because each ...
https://dev.mysql.com/doc/refman/5.7/en/libmysqld-options.html
Any options that may be given with the mysqld server daemon, may be used with an embedded server library. Server options may be given in an array as an argument to the mysql_library_init(), which initializes the server. They also may be given in an ...
https://dev.mysql.com/doc/refman/5.7/en/merge-storage-engine.html
The MERGE storage engine, also known as the MRG_MyISAM engine, is a collection of identical MyISAM tables that can be used as one. “Identical” means that all tables have identical column data types and index information. You cannot merge MyISAM ...
https://dev.mysql.com/doc/refman/5.7/en/multiple-server-clients.html
Specify the default Unix socket file and TCP/IP port number in the [client] group of an option file. Start the client with --protocol=TCP to connect using TCP/IP, --protocol=SOCKET to connect using a Unix socket file, --protocol=PIPE to connect ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-overview.html
For more information about data nodes, how they are organized in an NDB Cluster, and how they handle and store NDB Cluster data, see Section 21.2.2, “NDB Cluster Nodes, Node Groups, Fragment Replicas, and Partitions”. NDB Cluster is a ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-tcp-definition-direct.html
Note To take the best advantage of direct connections in this fashion with more than two data nodes, you must have a direct connection between each data node and every other data node in the same node group. Setting up a cluster using direct ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-server-side-help.html
mysql> help search_string If you provide an argument to the help command, mysql uses it as a search string to access server-side help from the contents of the MySQL Reference Manual. The proper operation of this command requires that the help ...
https://dev.mysql.com/doc/refman/5.7/en/processlist-access.html
The following sections list the possible Command values, and State values grouped by category. The following discussion enumerates the sources of process information, the privileges required to see process information, and describes the content of ...