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https://dev.mysql.com/doc/refman/8.4/en/cursors.html
Cursors have these properties: Asensitive: The server may or may not make a copy of its result table Read only: Not updatable Nonscrollable: Can be traversed only in one direction and cannot skip rows Cursor declarations must appear before handler ...
https://dev.mysql.com/doc/refman/8.4/en/datetime.html
In particular, any fractional part in a value inserted into a DATETIME or TIMESTAMP column is stored rather than discarded. You can specify a time zone offset when inserting a TIMESTAMP or DATETIME value into a table. This section describes their ...
https://dev.mysql.com/doc/refman/8.4/en/enterprise-encryption-usage.html
To use MySQL Enterprise Encryption in applications, invoke the functions that are appropriate for the operations you wish to perform. MySQL Enterprise Encryption functions are provided by a MySQL component component_enterprise_encryption. For ...
https://dev.mysql.com/doc/refman/8.4/en/explain-extended.html
Extended information is available for SELECT, DELETE, INSERT, REPLACE, and UPDATE statements. SHOW WARNINGS displays an empty result for other explainable statements (DELETE, INSERT, REPLACE, and UPDATE). The EXPLAIN statement produces extra ...
https://dev.mysql.com/doc/refman/8.4/en/explain-for-connection.html
To obtain the execution plan for an explainable statement executing in a named connection, use this statement: EXPLAIN [options] FOR CONNECTION connection_id; EXPLAIN FOR CONNECTION returns the EXPLAIN information that is currently being used to ...
https://dev.mysql.com/doc/refman/8.4/en/forcing-innodb-recovery.html
As a safety measure, InnoDB prevents INSERT, UPDATE, or DELETE operations when innodb_force_recovery is greater than 0. To investigate database page corruption, you might dump your tables from the database with SELECT ... Usually, most of the data ...
https://dev.mysql.com/doc/refman/8.4/en/fulltext-boolean.html
MySQL can perform boolean full-text searches using the IN BOOLEAN MODE modifier. With this modifier, certain characters have special meaning at the beginning or end of words in the search string. In the following query, the + and - operators ...
https://dev.mysql.com/doc/refman/8.4/en/fulltext-natural-language.html
If you create a MyISAM table and insert only one or two rows of text into it, every word in the text occurs in at least 50% of the rows. By default or with the IN NATURAL LANGUAGE MODE modifier, the MATCH() function performs a natural language ...
https://dev.mysql.com/doc/refman/8.4/en/fulltext-search-mecab.html
The built-in MySQL full-text parser uses the white space between words as a delimiter to determine where words begin and end, which is a limitation when working with ideographic languages that do not use word delimiters. To address this limitation ...
https://dev.mysql.com/doc/refman/8.4/en/fulltext-search-ngram.html
The following example demonstrates creating a table with an ngram FULLTEXT index, inserting sample data (Simplified Chinese text), and viewing tokenized data in the Information Schema INNODB_FT_INDEX_CACHE table. The built-in MySQL full-text parser ...