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https://dev.mysql.com/doc/refman/5.7/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/5.7/en/information-schema-ndb-transid-mysql-connection-map-table.html
The ndb_transid_mysql_connection_map table provides a mapping between NDB transactions, NDB transaction coordinators, and MySQL Servers attached to an NDB Cluster as API nodes. This information is used when populating the server_operations and ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-information-schema-examples.html
Identifying Blocking Transactions It is sometimes helpful to identify which transaction blocks another. The tables that contain information about InnoDB transactions and data locks enable you to determine which transaction is waiting for another, ...
https://dev.mysql.com/doc/refman/5.7/en/json-attribute-functions.html
Returns NULL if any argument is NULL or the path argument does not identify a value in the document. The functions in this section return attributes of JSON values. An error occurs if the argument is not a valid JSON document. An empty array, empty ...
https://dev.mysql.com/doc/refman/5.7/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 thread is stopped as well ...
https://dev.mysql.com/doc/refman/5.7/en/libmysqld-example.html
* * You can use mysql_library_init(0, NULL, NULL), and it * initializes the server using groups = { * "server", "embedded", NULL * }. These two example programs should work without any changes on a Linux or FreeBSD system. For other operating ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-threads-table.html
row *************************** THREAD_ID: 1 NAME: thread/sql/main TYPE: BACKGROUND PROCESSLIST_ID: NULL PROCESSLIST_USER: NULL PROCESSLIST_HOST: NULL PROCESSLIST_DB: NULL PROCESSLIST_COMMAND: NULL PROCESSLIST_TIME: 80284 PROCESSLIST_STATE: NULL ...
https://dev.mysql.com/doc/refman/5.7/en/partitioning-selection.html
MySQL 5.7 supports explicit selection of partitions and subpartitions that, when executing a statement, should be checked for rows matching a given WHERE condition. Partition selection is similar to partition pruning, in that only specific ...
https://dev.mysql.com/doc/refman/5.7/en/json-creation-functions.html
mysql> SELECT JSON_ARRAY(1, "abc", NULL, TRUE, CURTIME()); +---------------------------------------------+ | JSON_ARRAY(1, "abc", NULL, TRUE, CURTIME()) | +---------------------------------------------+ | [1, "abc", null, true, "11:30:24.000000"] | ... The functions listed in this section compose JSON values from component ...
https://dev.mysql.com/doc/refman/5.7/en/gis-general-property-functions.html
ST_Dimension(g) Returns the inherent dimension of the geometry value g, or NULL if the argument is NULL. ST_Envelope(g) Returns the minimum bounding rectangle (MBR) for the geometry value g, or NULL if the argument is NULL. ST_GeometryType(g) ...