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https://dev.mysql.com/doc/refman/5.7/en/trigger-syntax.html
To create a trigger or drop a trigger, use the CREATE TRIGGER or DROP TRIGGER statement, described in Section 13.1.20, “CREATE TRIGGER Statement”, and Section 13.1.31, “DROP TRIGGER Statement”. Here is a simple example that associates a ...
https://dev.mysql.com/doc/refman/5.7/en/replication-semisync.html
If your goal is to implement a fault-tolerant replication topology where all the servers receive the same transactions in the same order, and a server that crashes can rejoin the group and be brought up to date automatically, you can use Group ...
https://dev.mysql.com/doc/refman/5.7/en/connecting.html
If named-pipe connections are not supported or if the user making the connection is not a member of the Windows group specified by the named_pipe_full_access_group system variable, an error occurs. If the server was not started with the named_pipe ... This section describes use of command-line options to specify how to establish connections to the MySQL server, for clients such as mysql or ...
https://dev.mysql.com/doc/refman/5.7/en/ndb-restore-different-number-nodes.html
Note When changing the total number of LCP threads or LQH threads per node group, you should recreate the schema from backup created using mysqldump. In NDB 7.5.2 and later, this step is necessary only if the total number of LCP threads or LQH ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-programs-ndb-select-all.html
--defaults-group-suffix Command-Line Format --defaults-group-suffix=string Type String Default Value [none] Also read groups with concat(group, suffix). ndb_select_all prints all rows from an NDB table to stdout. Usage ndb_select_all -c ...
https://dev.mysql.com/doc/refman/5.7/en/blob.html
You can make more bytes significant in sorting or grouping by increasing the value of max_sort_length at server startup or runtime. A BLOB is a binary large object that can hold a variable amount of data. These differ only in the maximum length of ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-file-space.html
The pages are grouped into extents of size 1MB for pages up to 16KB in size (64 consecutive 16KB pages, or 128 8KB pages, or 256 4KB pages). The data files that you define in the configuration file using the innodb_data_file_path configuration ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-transaction-summary-tables.html
row *************************** EVENT_NAME: transaction COUNT_STAR: 5 SUM_TIMER_WAIT: 19550092000 MIN_TIMER_WAIT: 2954148000 AVG_TIMER_WAIT: 3910018000 MAX_TIMER_WAIT: 5486275000 COUNT_READ_WRITE: 5 SUM_TIMER_READ_WRITE: 19550092000 ... The ...
https://dev.mysql.com/doc/refman/5.7/en/range-optimization.html
The range access method uses a single index to retrieve a subset of table rows that are contained within one or several index value intervals. The following sections describe conditions under which the optimizer uses range access. Additionally, for ...
https://dev.mysql.com/doc/refman/5.7/en/access-control.html
MySQL enables the creation of accounts that permit client users to connect to the server and access data managed by the server. The primary function of the MySQL privilege system is to authenticate a user who connects from a given host and to ...