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25.3 Performance Schema Startup Configuration

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 ...

13.6.5.6 REPEAT Statement

https://dev.mysql.com/doc/refman/5.7/en/repeat.html

[begin_label:] REPEAT statement_list UNTIL search_condition END REPEAT [end_label] The statement list within a REPEAT statement is repeated until the search_condition expression is true. statement_list consists of one or more statements, each ...

16.4.1.37 Replication and Variables

https://dev.mysql.com/doc/refman/5.7/en/replication-features-variables.html

sql_mode is also replicated except for the NO_DIR_IN_CREATE mode; the replica always preserves its own value for NO_DIR_IN_CREATE, regardless of changes to it on the source. However, when mysqlbinlog parses a SET @@sql_mode = mode statement, the ...

16.1.6.5 Global Transaction ID System Variables

https://dev.mysql.com/doc/refman/5.7/en/replication-options-gtids.html

The MySQL Server system variables described in this section are used to monitor and control Global Transaction Identifiers (GTIDs). For additional information, see Section 16.1.3, “Replication with Global Transaction Identifiers”.

16.3.9.2 Semisynchronous Replication Installation and Configuration

https://dev.mysql.com/doc/refman/5.7/en/replication-semisync-installation.html

Semisynchronous replication is implemented using plugins, so the plugins must be installed into the server to make them available. After a plugin has been installed, you control it by means of the system variables associated with it. These system ...

11.3.6 The SET Type

https://dev.mysql.com/doc/refman/5.7/en/set.html

A SET is a string object that can have zero or more values, each of which must be chosen from a list of permitted values specified when the table is created. SET column values that consist of multiple set members are specified with members ...

13.6.7.5 SIGNAL Statement

https://dev.mysql.com/doc/refman/5.7/en/signal.html

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 (error number, SQLSTATE value, message). Without SIGNAL, it is necessary to resort ...

23.1 Defining Stored Programs

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 ...

12.8 String Functions and Operators

https://dev.mysql.com/doc/refman/5.7/en/string-functions.html

For functions that operate on string positions, the first position is numbered 1. For functions that take length arguments, noninteger arguments are rounded to the nearest integer. ASCII(str) Returns the numeric value of the leftmost character of ...