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https://dev.mysql.com/doc/refman/8.4/en/gis-geometrycollection-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. If any geometry argument is not a syntactically ...
https://dev.mysql.com/doc/refman/8.4/en/replication-features-row-searches.html
A unique index where every column in the index has a NOT NULL attribute. If the algorithm is able to select a primary key or a unique index where every column in the index has a NOT NULL attribute, it uses this index to iterate over the rows in the ... When a replica using row-based replication format applies an UPDATE or DELETE operation, it must search the relevant table for the matching ...
https://dev.mysql.com/doc/refman/8.4/en/where-optimization.html
This is also done for any NOT NULL expression when used with only one table. A table that is used with a WHERE clause on a PRIMARY KEY or a UNIQUE index, where all index parts are compared to constant expressions and are defined as NOT NULL. This ...
https://dev.mysql.com/doc/mysql-ai/9.4/en/mys-ai-aml-using-a-recommendation-model-items-to-users.html
For the option to set the user name, you can set it to NULL. mysql> CALL sys.ML_MODEL_LOAD(@model, NULL); The following example uses the model handle. mysql> CALL sys.ML_MODEL_LOAD('recommendation_use_case', NULL); Make predictions for the test ...
https://dev.mysql.com/doc/mysql-ai/9.4/en/mys-ai-aml-using-a-recommendation-model-users-to-items.html
For the option to set the user name, you can set it to NULL. mysql> CALL sys.ML_MODEL_LOAD(@model, NULL); The following example uses the model handle. mysql> CALL sys.ML_MODEL_LOAD('recommendation_use_case', NULL); Make predictions for the test ...
https://dev.mysql.com/doc/x-devapi-userguide/en/dynamic-sql.html
A quoting function exists to escape SQL names and identifiers. Session.quoteName() escapes the identifier given in accordance to the settings of the current connection. Note The quoting function must not be used to escape values. Use the value ...
https://dev.mysql.com/doc/refman/8.4/en/optimizer-statistics.html
Here is a sample histogram object: { "buckets": [ [ 1, 0.3333333333333333 ], [ 2, 0.6666666666666666 ], [ 3, 1 ] ], "null-values": 0, "last-updated": "2017-03-24 13:32:40.000000", "sampling-rate": 1, "histogram-type": "singleton", ... The ...
https://dev.mysql.com/doc/connectors/en/connector-j-usagenotes-statements.html
Statement objects allow you to execute basic SQL queries and retrieve the results through the ResultSet class, which is described later. To create a Statement instance, you call the createStatement() method on the Connection object you have ...
https://dev.mysql.com/doc/connector-j/en/connector-j-usagenotes-statements.html
Statement objects allow you to execute basic SQL queries and retrieve the results through the ResultSet class, which is described later. To create a Statement instance, you call the createStatement() method on the Connection object you have ...
https://dev.mysql.com/doc/refman/8.4/en/information-schema-statistics-table.html
This can have values A (ascending), D (descending), or NULL (not sorted). That is, the number of indexed characters if the column is only partly indexed, NULL if the entire column is indexed. NULLABLE Contains YES if the column may contain NULL ...