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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-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) ...
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/fulltext-natural-language.html
By default or with the IN NATURAL LANGUAGE MODE modifier, the MATCH() function performs a natural language search for a string against a text collection. A collection is a set of one or more columns included in a FULLTEXT index. For each row in the ...
https://dev.mysql.com/doc/refman/5.7/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 12.2, “Loadable Function Reference”. ->> Return value ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-online-operations.html
This does not perform any defragmentation, which requires an OPTIMIZE TABLE or null ALTER TABLE statement. The columns must permit NULL values and not have any explicit default value other than NULL. row *************************** Table: t1 Create ... MySQL NDB Cluster 7.5 and 7.6 support online table schema changes using ALTER TABLE ...
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/ldap-pluggable-authentication.html
Note LDAP pluggable authentication is an extension included in MySQL Enterprise Edition, a commercial product. As of MySQL 5.7.19, MySQL Enterprise Edition supports an authentication method that enables MySQL Server to use LDAP (Lightweight ...