https://dev.mysql.com/charset-collation-implementations.html
Example: "U+0000 NULL" does not have a weight and is ignorable. MySQL implements several types of collations: Simple collations for 8-bit character sets This kind of collation is implemented using an array of 256 weights that defines a one-to-one ...
https://dev.mysql.com/charset-conversion.html
For example, if you specified NOT NULL and an explicit DEFAULT value, you should also provide them in the ALTER TABLE statement. To convert a binary or nonbinary string column to use a particular character set, use ALTER TABLE. For successful ...
https://dev.mysql.com/charset-errors.html
If character_set_results has a value of NULL or binary, no conversion occurs. This section describes how the MySQL server uses character sets for constructing error messages. For information about the language of error messages (rather than the ...
https://dev.mysql.com/charset-metadata.html
If character_set_results is set to NULL, no conversion is performed and the server returns metadata using its original character set (the set indicated by character_set_system). Metadata is “the data about the data.” Anything that describes the ...
https://dev.mysql.com/charset-unicode-utf32.html
The utf32 character set is fixed length (like ucs2 and unlike utf16). utf32 uses 32 bits for every character, unlike ucs2 (which uses 16 bits for every character), and unlike utf16 (which uses 16 bits for some characters and 32 bits for others).
https://dev.mysql.com/client-error-reference.html
Client error messages originate from within the MySQL client library. Here is an example client error message, as displayed by the mysql client: shell> mysql -h no-such-host ERROR 2005 (HY000): Unknown MySQL server host 'no-such-host' (0) Each ...
https://dev.mysql.com/clone-plugin-options-variables.html
clone_valid_donor_list Property Value Command-Line Format --clone-valid-donor-list=value Introduced 8.0.17 System Variable clone_valid_donor_list Scope Global Dynamic Yes SET_VAR Hint Applies No Type String Default Value NULL Defines valid donor ...
https://dev.mysql.com/clone-plugin-stop.html
If necessary, you can stop a cloning operation with a KILL QUERY processlist_id statement. On the recipient MySQL server instance, you can retrieve the processlist identifier (PID) for a cloning operation from the PID column of the clone_status ...
https://dev.mysql.com/clone-status-table.html
Note The Performance Schema table described here is available as of MySQL 8.0.17. The clone_status table shows the status of the current or last executed cloning operation only. The table only ever contains one row of data, or is empty. The ...
https://dev.mysql.com/create-procedure.html
Its initial value is NULL within the procedure, and its value is visible to the caller when the procedure returns. To associate the routine explicitly with a given database, specify the name as db_name.sp_name when you create it. The CREATE FUNCTION ...
