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https://dev.mysql.com/doc/refman/8.4/en/gis-class-multicurve.html
A MultiCurve is simple if and only if all of its elements are simple; the only intersections between any two elements occur at points that are on the boundaries of both elements. A MultiCurve is a geometry collection composed of Curve elements. A ...
https://dev.mysql.com/doc/refman/8.4/en/gis-class-polygon.html
Polygon Assertions The boundary of a Polygon consists of a set of LinearRing objects (that is, LineString objects that are both simple and closed) that make up its exterior and interior boundaries. A Polygon is a planar Surface representing a ...
https://dev.mysql.com/doc/refman/8.4/en/gis-format-conversion-functions.html
Functions such as ST_GeomFromText() that accept WKT geometry collection arguments understand both OpenGIS 'GEOMETRYCOLLECTION EMPTY' standard syntax and MySQL 'GEOMETRYCOLLECTION()' nonstandard syntax. MySQL supports the functions listed in this ...
https://dev.mysql.com/doc/refman/8.4/en/group-by-functional-dependence.html
The following discussion provides several examples of the ways in which MySQL detects functional dependencies. The examples use this notation: {X} -> {Y} Understand this as “X uniquely determines Y,” which also means that Y is functionally ...
https://dev.mysql.com/doc/refman/8.4/en/group-replication-communication-protocol.html
If two members attempt to join in the same membership change event, they can only join if the communication protocol version for both members is already compatible with the group's communication protocol version. Group Replication in MySQL 8.4 uses ...
https://dev.mysql.com/doc/refman/8.4/en/group-replication-configuring-ssl-for-recovery.html
The group members involved in each distributed recovery connection as the client (joining member) and server (donor) negotiate the highest protocol version that they are both set up to support. Important When using the MySQL communication stack ...
https://dev.mysql.com/doc/refman/8.4/en/group-replication-network-partitioning.html
Check replication_group_members on both s1 and s2 to verify the group membership after this change. The group needs to achieve consensus whenever a change that needs to be replicated happens. This is the case for regular transactions but is also ...
https://dev.mysql.com/doc/refman/8.4/en/group-replication-observability.html
For example, you can connect to a single server in the group and obtain both local and global information by issuing select statements on the Group Replication related Performance Schema tables. There is a lot of automation built into the Group ...
https://dev.mysql.com/doc/refman/8.4/en/group-replication-online-upgrade-methods.html
This assumes that you have enough servers to run both groups simultaneously. Choose one of the following methods of upgrading a Group Replication group: Rolling In-Group Upgrade This method is supported provided that servers running a newer version ...
https://dev.mysql.com/doc/refman/8.4/en/group-replication-probes-and-statistics.html
The information is shared every second, and this period is sufficient to address both concerns. The monitoring mechanism works by having each member deploying a set of probes to collect information about its work queues and throughput. It then ...