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https://dev.mysql.com/doc/refman/8.4/en/extensions-to-ansi.html
Data types The MEDIUMINT, SET, and ENUM data types, and the various BLOB and TEXT data types. MySQL Server supports some extensions that you are not likely to find in other SQL DBMSs. Be warned that if you use them, your code is most likely not ...
https://dev.mysql.com/doc/refman/8.4/en/faqs-mysql-cluster.html
Is it possible to use FULLTEXT indexes with NDB Cluster? A.10.23. Is it possible to use FULLTEXT indexes with NDB Cluster? FULLTEXT indexing is currently supported only by the InnoDB and MyISAM storage engines. In the following section, we answer ...
https://dev.mysql.com/doc/refman/8.4/en/federated-usagenotes.html
For example, creating a FEDERATED table fails if the table uses an index prefix on any VARCHAR, TEXT or BLOB columns. The following items indicate features that the FEDERATED storage engine does and does not support: The remote server must be a ...
https://dev.mysql.com/doc/refman/8.4/en/general-thread-states.html
FULLTEXT initialization The server is preparing to perform a natural-language full-text search. The following list describes thread State values that are associated with general query processing and not more specialized activities such as ...
https://dev.mysql.com/doc/refman/8.4/en/group-by-modifiers.html
The GROUP BY clause permits a WITH ROLLUP modifier that causes summary output to include extra rows that represent higher-level (that is, super-aggregate) summary operations. ROLLUP thus enables you to answer questions at multiple levels of ...
https://dev.mysql.com/doc/refman/8.4/en/group-replication-frequently-asked-questions.html
User credentials set using CHANGE REPLICATION SOURCE TO are stored in plain text in the replication metadata repositories on the server, but user credentials specified on START GROUP_REPLICATION are saved in memory only, and are removed by a STOP ...
https://dev.mysql.com/doc/refman/8.4/en/group-replication-secure-user.html
User credentials set using CHANGE REPLICATION SOURCE TO are stored in plain text in the replication metadata repositories on the server, but user credentials specified on START GROUP_REPLICATION are saved in memory only, and are removed by a STOP ...
https://dev.mysql.com/doc/refman/8.4/en/group-replication-user-credentials.html
User credentials set using CHANGE REPLICATION SOURCE TO are stored in plain text in the replication metadata repositories on the server. Group Replication uses a distributed recovery process to synchronize group members when joining them to the ...
https://dev.mysql.com/doc/refman/8.4/en/help.html
HELP 'search_string' The HELP statement returns online information from the MySQL Reference Manual. Its proper operation requires that the help tables in the mysql database be initialized with help topic information (see Section 7.1.17, ...
https://dev.mysql.com/doc/refman/8.4/en/index-merge-optimization.html
The Index Merge access method retrieves rows with multiple range scans and merges their results into one. This access method merges index scans from a single table only, not scans across multiple tables. The merge can produce unions, intersections, ...