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https://dev.mysql.com/doc/refman/8.0/en/row-constructor-optimization.html
Consider the following table, which has a primary key on (c1, c2, c3): CREATE TABLE t1 ( c1 INT, c2 INT, c3 INT, c4 CHAR(100), PRIMARY KEY(c1,c2,c3) ); In this query, the WHERE clause uses all columns in the index. For example, these two statements ...
https://dev.mysql.com/doc/refman/8.0/en/show-create-table.html
row *************************** Table: t Create Table: CREATE TABLE `t` ( `id` int NOT NULL AUTO_INCREMENT, `s` char(60) DEFAULT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci As of MySQL 8.0.16, MySQL ...
https://dev.mysql.com/doc/refman/8.0/en/show-index.html
That is, the number of indexed characters if the column is only partly indexed, NULL if the entire column is indexed. However, prefix lengths for index specifications in CREATE TABLE, ALTER TABLE, and CREATE INDEX statements are interpreted as ...
https://dev.mysql.com/doc/refman/8.0/en/silent-column-changes.html
If strict SQL mode is not enabled, a VARCHAR column with a length specification greater than 65535 is converted to TEXT, and a VARBINARY column with a length specification greater than 65535 is converted to BLOB. Specifying the CHARACTER SET binary ... In some cases, MySQL silently changes column specifications from those given in a CREATE TABLE or ALTER TABLE ...
https://dev.mysql.com/doc/refman/8.0/en/static-format.html
It is used when the table contains no variable-length columns (VARCHAR, VARBINARY, BLOB, or TEXT). Static-format tables have these characteristics: CHAR and VARCHAR columns are space-padded to the specified column width, although the column type is ...Of the three MyISAM storage formats, static format is the simplest and most secure (least subject to ...
https://dev.mysql.com/doc/refman/8.0/en/stored-programs-logging.html
Triggers are similar to stored functions, so the preceding remarks regarding functions also apply to triggers with the following exception: CREATE TRIGGER does not have an optional DETERMINISTIC characteristic, so triggers are assumed to be always ... The binary log contains information about SQL statements that modify database ...
https://dev.mysql.com/doc/refman/8.0/en/string-comparison-functions.html
expr LIKE pat [ESCAPE 'escape_char'] Pattern matching using an SQL pattern. This differs from comparisons performed with the = operator, for which the significance of trailing spaces in nonbinary strings (CHAR, VARCHAR, and TEXT values) depends on ... Table 14.13 String Comparison Functions and Operators Name Description LIKE Simple pattern matching NOT LIKE Negation of simple pattern matching STRCMP() Compare two strings If a string function is given a binary string as an argument, the resulting string is also a binary ...
https://dev.mysql.com/doc/refman/8.0/en/string-types.html
The string data types are CHAR, VARCHAR, BINARY, VARBINARY, BLOB, TEXT, ENUM, and SET. For information about storage requirements of the string data types, see Section 13.7, “Data Type Storage Requirements”. For descriptions of functions that ...
https://dev.mysql.com/doc/refman/8.0/en/firewall-usage.html
The scope indicates which client connections the profile applies to: The firewall supports account-based profiles such that each profile matches a particular client account (client user name and host name combination). Place the trained profiles in ... Before using MySQL Enterprise Firewall, install it according to the instructions provided in Section 8.4.7.2, “Installing or Uninstalling MySQL Enterprise ...
https://dev.mysql.com/doc/refman/8.0/en/ibd2sdi.html
ibd2sdi is a utility for extracting serialized dictionary information (SDI) from InnoDB tablespace files. ibd2sdi can be run on file-per-table tablespace files (*.ibd files), general tablespace files (*.ibd files), system tablespace files (ibdata* ...