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https://dev.mysql.com/doc/refman/8.4/en/gis-polygon-property-functions.html
Unless otherwise specified, functions in this section handle their geometry arguments as follows: If any argument is NULL or any geometry argument is an empty geometry, the return value is NULL. ST_Centroid() handles its arguments as described in ...
https://dev.mysql.com/doc/refman/8.4/en/help.html
If X is less than or equal to 0.0E0, the function returns NULL and a warning "Invalid argument for logarithm" is reported. URL: https://dev.mysql.com/doc/refman/8.4/en/mathematical-functions.html Examples: mysql> SELECT LOG(2); -> 0.69314718055995 ... HELP 'search_string' The HELP statement returns online information from the MySQL Reference ...
https://dev.mysql.com/doc/refman/8.4/en/insert.html
Warnings can occur under any of the following conditions: Inserting NULL into a column that has been declared NOT NULL. (For a single-row INSERT, no warning occurs when NULL is inserted into a NOT NULL column. INSERT [LOW_PRIORITY | DELAYED | ...
https://dev.mysql.com/doc/refman/8.4/en/spatial-relation-functions-mbr.html
Unless otherwise specified, functions in this section handle their geometry arguments as follows: If any argument is NULL or an empty geometry, the return value is NULL. MBREquals() handles its arguments as described in the introduction to this ...
https://dev.mysql.com/doc/extending-mysql/8.4/en/writing-authentication-plugins-proxy-users.html
row *************************** USER(): plugin_user1@localhost CURRENT_USER(): plugin_user1@localhost @@proxy_user: NULL @@external_user: NULL Then connect as plugin_user2: $> mysql --user=plugin_user2 --password Enter password: x In this case, ...
https://dev.mysql.com/doc/ndbapi/en/ndb-ndb-cluster-connection.html
Signature const Ndb* get_next_ndb_object ( const Ndb* p ) Parameters This method takes a single parameter, a pointer to the last Ndb object to have been retrieved or NULL. Return value Returns the next Ndb object, or NULL if no more Ndb objects are ... This section provides information about the Ndb_cluster_connection class, which models a connection by a management server (ndb_mgmd) to a set of data ...
https://dev.mysql.com/doc/x-devapi-userguide-shell-js/en/collection-modify.html
The modify(SearchConditionStr) function is for modifying documents in a collection, similar to an UPDATE statement for an SQL database. It takes a search condition string (SearchConditionStr) as a parameter to specify the documents that are to be ...
https://dev.mysql.com/doc/refman/8.4/en/gis-linestring-property-functions.html
Unless otherwise specified, functions in this section handle their geometry arguments as follows: If any argument is NULL or any geometry argument is an empty geometry, the return value is NULL. ST_IsClosed() returns 0 if ls is not closed, and NULL ...You can extract particular points of a LineString, count the number of points that it contains, or obtain its ...
https://dev.mysql.com/doc/refman/8.4/en/innodb-page-compression.html
InnoDB supports page-level compression for tables that reside in file-per-table tablespaces. Page compression is enabled by specifying the COMPRESSION attribute with CREATE TABLE or ALTER TABLE. Supported Platforms Page compression requires sparse ...
https://dev.mysql.com/doc/refman/8.4/en/update.html
If you update a column that has been declared NOT NULL by setting to NULL, an error occurs if strict SQL mode is enabled; otherwise, the column is set to the implicit default value for the column data type and the warning count is incremented.