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https://dev.mysql.com/doc/refman/5.7/en/signal.html
It is illegal to assign NULL to a condition information item in a SIGNAL statement. SIGNAL provides error information to a handler, to an outer portion of the application, or to the client. Also, it provides control over the error's characteristics ...
https://dev.mysql.com/doc/refman/5.7/en/myisam-storage-engine.html
MyISAM is based on the older (and no longer available) ISAM storage engine but has many useful extensions. Table 15.2 MyISAM Storage Engine Features Feature Support B-tree indexes Yes Backup/point-in-time recovery (Implemented in the server, rather ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-programs-ndb-move-data.html
Usage The program is invoked with the names of the source and target tables; either or both of these may be qualified optionally with the database name. ndb_move_data options source target Options that can be used with ndb_move_data are shown in the ...
https://dev.mysql.com/doc/refman/5.7/en/column-indexes.html
The most common type of index involves a single column, storing copies of the values from that column in a data structure, allowing fast lookups for the rows with the corresponding column values. The B-tree data structure lets the index quickly ...
https://dev.mysql.com/doc/refman/5.7/en/features.html
This section describes some of the important characteristics of the MySQL Database Software. In most respects, the roadmap applies to all versions of MySQL. Tested with Purify (a commercial memory leakage detector) as well as with Valgrind, a GPL ...
https://dev.mysql.com/doc/refman/5.7/en/innochecksum.html
Attempting to run innochecksum on a tablespace that the server already has open results in an Unable to lock file error. This tool reads an InnoDB tablespace file, calculates the checksum for each page, compares the calculated checksum to the stored ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-buffer-pool-resize.html
You can configure InnoDB buffer pool size offline or while the server is running. For additional information about configuring buffer pool size online, see Configuring InnoDB Buffer Pool Size Online. When increasing or decreasing ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-startup-configuration.html
To use the MySQL Performance Schema, it must be enabled at server startup to enable event collection to occur. Assuming that the Performance Schema is available, it is enabled by default. To enable or disable it explicitly, start the server with ...
https://dev.mysql.com/doc/refman/5.7/en/stored-programs-defining.html
Each stored program contains a body that consists of an SQL statement. This statement may be a compound statement made up of several statements separated by semicolon (;) characters. For example, the following stored procedure has a body made up of ...
https://dev.mysql.com/doc/refman/5.7/en/connection-interfaces.html
This section describes aspects of how the MySQL server manages client connections. Network Interfaces and Connection Manager Threads Client Connection Thread Management Connection Volume Management Network Interfaces and Connection Manager Threads ...