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https://dev.mysql.com/doc/refman/8.0/en/blackhole-storage-engine.html
In this scenario replication fails with a duplicate entry error on the primary key column. The BLACKHOLE storage engine acts as a “black hole” that accepts data but throws it away and does not store it. To examine the source for the BLACKHOLE ...
https://dev.mysql.com/doc/refman/8.0/en/cannot-find-table.html
Even for file systems that are not case-sensitive, such as on Windows, all references to a given table within a query must use the same lettercase. You can check which tables are in the default database with SHOW TABLES.
https://dev.mysql.com/doc/refman/8.0/en/case.html
If no when_value or search_condition matches the value tested and the CASE statement contains no ELSE clause, a Case not found for CASE statement error results. CASE case_value WHEN when_value THEN statement_list [WHEN when_value THEN ...
https://dev.mysql.com/doc/refman/8.0/en/charset-configuration.html
For Unicode character sets, you can define collations without recompiling by using LDML notation. See Section 12.14.4, “Adding a UCA Collation to a Unicode Character Set”. The MySQL server has a compiled-in default character set and collation.
https://dev.mysql.com/doc/refman/8.0/en/charset-metadata.html
To satisfy both requirements, MySQL stores metadata in a Unicode character set, namely UTF-8. Error messages returned from the server to the client are converted to the client character set automatically, as with metadata. Although automatic ...
https://dev.mysql.com/doc/refman/8.0/en/charset-server.html
MySQL Server has a server character set and a server collation. By default, these are utf8mb4 and utf8mb4_0900_ai_ci, but they can be set explicitly at server startup on the command line or in an option file and changed at runtime. Initially, the ...
https://dev.mysql.com/doc/refman/8.0/en/charset.html
MySQL includes character set support that enables you to store data using a variety of character sets and perform comparisons according to a variety of collations. The default MySQL server character set and collation are utf8mb4 and ...
https://dev.mysql.com/doc/refman/8.0/en/clone-plugin-concurrent-ddl.html
If a backup lock is not obtained with the specified time limit, the cloning operation fails with an error. Prior to MySQL 8.0.27, DDL operations on the donor and recipient MySQL Server instances, including TRUNCATE TABLE, are not permitted during a ...
https://dev.mysql.com/doc/refman/8.0/en/clone-plugin-encrypted-data.html
An error is reported if an encrypted connection is not available or the REQUIRE NO SSL clause is used in the CLONE INSTANCE statement. The following requirements apply: A secure connection is required when cloning remote data to ensure safe transfer ...
https://dev.mysql.com/doc/refman/8.0/en/clone-plugin-monitoring.html
You can monitor the status and progress of a cloning operation on the recipient MySQL server instance using the clone_status and clone_progress Performance Schema tables. Note The clone_status and clone_progress Performance Schema tables can be used ...