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https://dev.mysql.com/doc/refman/9.7/en/performance-schema-replication-tables.html
This is similar to the information available from the SHOW REPLICA STATUS statement, but representation in table form is more accessible and has usability benefits: SHOW REPLICA STATUS output is useful for visual inspection, but not so much for ...
https://dev.mysql.com/doc/refman/9.7/en/performance-schema-system-variables.html
The Performance Schema automatically sizes the values of several of its parameters at server startup if they are not set explicitly. Performance Schema system variables have the following meanings: performance_schema Command-Line Format ...
https://dev.mysql.com/doc/refman/9.7/en/replication-administration-status.html
The most common task when managing a replication process is to ensure that replication is taking place and that there have been no errors between the replica and the source. The SHOW REPLICA STATUS statement, which you must execute on each replica, ...
https://dev.mysql.com/doc/refman/9.7/en/replication-features-row-searches.html
When a replica using row-based replication format applies an UPDATE or DELETE operation, it must search the relevant table for the matching rows. The algorithm used to carry out this process uses one of the table's indexes to carry out the search ...
https://dev.mysql.com/doc/refman/9.7/en/replication-functions-synchronization.html
The functions listed in this section are used for controlling position-based synchronization of source and replica servers in MySQL Replication. Table 14.28 Positional Synchronization Functions Name Description Deprecated MASTER_POS_WAIT() Block ...
https://dev.mysql.com/doc/refman/9.7/en/row-constructor-optimization.html
For example, these two statements are semantically equivalent: SELECT * FROM t1 WHERE (column1,column2) = (1,1); SELECT * FROM t1 WHERE column1 = 1 AND column2 = 1; In addition, the optimizer handles both expressions the same way. The optimizer is ...
https://dev.mysql.com/doc/refman/9.7/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 ...
https://dev.mysql.com/doc/refman/9.7/en/spatial-geohash-functions.html
Geohash is a system for encoding latitude and longitude coordinates of arbitrary precision into a text string. Geohash values are strings that contain only characters chosen from "0123456789bcdefghjkmnpqrstuvwxyz". The functions in this section ...
https://dev.mysql.com/doc/refman/9.7/en/srjsapi-session.html
The Session object is always available as the session property of the global object. Session has the methods listed here: createSchema(String name): Creates a database having the specified name, and returns the corresponding Schema object. Returns ...
https://dev.mysql.com/doc/refman/9.7/en/string-type-syntax.html
The string data types are CHAR, VARCHAR, BINARY, VARBINARY, BLOB, TEXT, ENUM, and SET. In some cases, MySQL may change a string column to a type different from that given in a CREATE TABLE or ALTER TABLE statement. For definitions of character ...