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https://dev.mysql.com/doc/refman/8.0/en/gis-class-linestring.html
A LineString is a Curve with linear interpolation between points. LineString Properties A LineString has coordinates of segments, defined by each consecutive pair of points. A LineString is a Line if it consists of exactly two points. LineString ...
https://dev.mysql.com/doc/refman/8.0/en/gis-class-multipoint.html
A MultiPoint is a geometry collection composed of Point elements. MultiPoint Examples On a world map, a MultiPoint could represent a chain of small islands. On a city map, a MultiPoint could represent the outlets for a ticket office. A MultiPoint ...
https://dev.mysql.com/doc/refman/8.0/en/gis-geometrycollection-property-functions.html
mysql> SET @gc = 'GeometryCollection(Point(1 1),LineString(2 2, 3 3))'; mysql> SELECT ST_AsText(ST_GeometryN(ST_GeomFromText(@gc),1)); +-------------------------------------------------+ | ST_AsText(ST_GeometryN(ST_GeomFromText(@gc),1)) | ...Unless ...
https://dev.mysql.com/doc/refman/8.0/en/gis-wkt-functions.html
Functions such as ST_MPointFromText() and ST_GeomFromText() that accept WKT-format representations of MultiPoint values permit individual points within values to be surrounded by parentheses. For example, both of the following function calls are ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-system-variables.html
Group Replication's Group Communication System (GCS) is not available to validate the values until that point. group_replication_advertise_recovery_endpoints specifies how a joining member can establish a connection to an existing member for state ... This section lists the system variables that are specific to the Group Replication ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-parameters.html
innodb_checkpoint_disabled Command-Line Format --innodb-checkpoint-disabled[={OFF|ON}] System Variable innodb_checkpoint_disabled Scope Global Dynamic Yes SET_VAR Hint Applies No Type Boolean Default Value OFF This is a debug option that is only ...
https://dev.mysql.com/doc/refman/8.0/en/json.html
DATETIME A value that represents an earlier point in time is ordered before a value that represents a later point in time. If two values originally come from the MySQL DATETIME and TIMESTAMP types, respectively, they are equal if they represent the ...The JSON data type provides these advantages over storing JSON-format strings in a string column: Automatic validation of JSON documents stored in JSON ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-start-phases.html
This occurs when the cluster has been shut down after having been in use, when it is desired for the cluster to resume operations from the point where it left off. Apply all redo information until the latest restorable global checkpoint has been ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-upgrade-downgrade.html
Specifics depend on local conditions; this section provides general information about what should be done at each of the points in the upgrade and rollback process just described. To assure continuity of NDB replication, it is necessary to upgrade ... Versions Supported for Upgrade to NDB 8.0 Reverting an NDB Cluster 8.0 Upgrade Known Issues When Upgrading or Downgrading NDB Cluster This section provides information about NDB Cluster software and compatibility between different NDB Cluster 8.0 releases with regard to performing upgrades and ...
https://dev.mysql.com/doc/refman/8.0/en/numeric-type-attributes.html
For example, if an INT column is UNSIGNED, the size of the column's range is the same but its endpoints shift up, from -2147483648 and 2147483647 to 0 and 4294967295. MySQL supports an extension for optionally specifying the display width of ...