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https://dev.mysql.com/doc/refman/9.7/en/replication-threads-monitor-main.html
The SHOW PROCESSLIST statement provides information that tells you what is happening on the source and on the replica regarding replication. For information on source states, see Section 10.14.4, “Replication Source Thread States”. For replica ...
https://dev.mysql.com/doc/refman/9.7/en/scalar-subqueries.html
In its simplest form, a subquery is a scalar subquery that returns a single value. A scalar subquery is a simple operand, and you can use it almost anywhere a single column value or literal is legal, and you can expect it to have those ...
https://dev.mysql.com/doc/refman/9.7/en/spatial-convenience-functions.html
The functions in this section provide convenience operations on geometry values. Unless otherwise specified, functions in this section handle their geometry arguments as follows: If any argument is NULL, the return value is NULL. If any geometry ...
https://dev.mysql.com/doc/refman/9.7/en/spatial-geojson-functions.html
This section describes functions for converting between GeoJSON documents and spatial values. Feature and FeatureCollection objects are not supported, except that geometry objects are extracted from them. MySQL also supports a native JSON data type ...
https://dev.mysql.com/doc/refman/9.7/en/sys-sys-get-config.html
Given a configuration option name, returns the option value from the sys_config table, or the provided default value (which may be NULL) if the option does not exist in the table. If sys_get_config() returns the default value and that value is ...
https://dev.mysql.com/doc/refman/9.7/en/update.html
UPDATE is a DML statement that modifies rows in a table. An UPDATE statement can start with a WITH clause to define common table expressions accessible within the UPDATE. Single-table syntax: UPDATE [LOW_PRIORITY] [IGNORE] table_reference SET ...
https://dev.mysql.com/doc/refman/9.7/en/case.html
CASE case_value WHEN when_value THEN statement_list [WHEN when_value THEN statement_list] ... [ELSE statement_list] END CASE Or: CASE WHEN search_condition THEN statement_list [WHEN search_condition THEN statement_list] ... [ELSE statement_list] ...
https://dev.mysql.com/doc/refman/9.7/en/change-replication-source-to.html
] CHANGE REPLICATION SOURCE TO changes the parameters that the replica server uses for connecting to the source and reading data from the source. It also updates the contents of the replication metadata repositories (see Section 19.2.4, “Relay Log ...
https://dev.mysql.com/doc/refman/9.7/en/date-and-time-type-syntax.html
The date and time data types for representing temporal values are DATE, TIME, DATETIME, TIMESTAMP, and YEAR. For the DATE and DATETIME range descriptions, “supported” means that although earlier values might work, there is no guarantee. MySQL ...
https://dev.mysql.com/doc/refman/9.7/en/dynamic-format.html
Dynamic storage format is used if a MyISAM table contains any variable-length columns (VARCHAR, VARBINARY, BLOB, or TEXT), or if the table was created with the ROW_FORMAT=DYNAMIC table option. Dynamic format is a little more complex than static ...