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https://dev.mysql.com/doc/refman/8.4/en/information-schema-files-table.html
The value is NULL for all data files except for predefined system tablespace data files. A NULL value for a predefined system tablespace data file indicates that a file size limit was not defined explicitly. For NDB: For undo log files, this column ... The FILES table provides information about the files in which MySQL tablespace data is ...
https://dev.mysql.com/doc/mysql-shell/9.4/en/mysql-shell-utils-copy.html
Before attempting a copy using the ignoreVersion option, use MySQL Shell's upgrade checker utility checkForServerUpgrade() to check the source instance and fix any compatibility issues identified by the utility before attempting to copy. This ...
https://dev.mysql.com/doc/refman/8.4/en/gis-class-geometry.html
Exterior, interior, and boundary of an empty geometry are not defined (that is, they are represented by a NULL value). It is a noninstantiable class but has a number of properties, described in the following list, that are common to all geometry ...
https://dev.mysql.com/doc/refman/8.4/en/multifactor-authentication.html
Authentication involves one party establishing its identity to the satisfaction of a second party. Multifactor authentication (MFA) is the use of multiple authentication values (or “factors”) during the authentication process. MFA provides ...
https://dev.mysql.com/doc/refman/8.4/en/all-subqueries.html
The expression is FALSE if table t2 contains (12,6,NULL,-100) because there is a single value 12 in table t2 that is greater than 10. The expression is unknown (that is, NULL) if table t2 contains (0,NULL,1). The expression is TRUE if table t2 ...
https://dev.mysql.com/doc/refman/8.4/en/replication-administration-skip.html
If replication stops due to an issue with an event in a replicated transaction, you can resume replication by skipping the failed transaction on the replica. Before skipping a transaction, ensure that the replication I/O (receiver) thread is ...
https://dev.mysql.com/doc/mysql-router/9.4/en/mysqlrouter.html
Example contents of a bash script named reader.sh used in our example: #!/bin/bash KID_=$(keyctl search @us user ${ROUTER_ID} 2>/dev/null) if [ ! -z $KID_ ]; then keyctl pipe $KID_ fi Example usage: $> mysqlrouter --bootstrap=127.0.0.1:3310 ...
https://dev.mysql.com/doc/refman/8.4/en/gis-wkt-functions.html
If the options argument is NULL, the return value is NULL. These functions take as arguments a Well-Known Text (WKT) representation and, optionally, a spatial reference system identifier (SRID). For a description of WKT format, see Well-Known Text ...
https://dev.mysql.com/doc/mysql-router/9.4/en/mysql-router-rest-api-reference.html
For example, if the endpoint is "/metadata" then the URL is similar to "https://localhost:8443/api/20190715/metadata". See Section 6.1, “A Simple MySQL Router REST API Guide” for related information. This is the maximum number (integer) of ...
https://dev.mysql.com/doc/refman/8.4/en/built-in-function-reference.html
The following table lists each built-in (native) function and operator and provides a short description of each one. For a table listing functions that are loadable at runtime, see Section 14.2, “Loadable Function Reference”. ->> Return value ...