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https://dev.mysql.com/doc/refman/8.0/en/show-table-status.html
Prior to MySQL 8.0.16, Create_options shows the ENCRYPTION clause specified for tables created in file-per-table tablespaces. The encryption clause is not shown for tables created in general tablespaces. When creating a table with strict mode ...
https://dev.mysql.com/doc/refman/8.0/en/show-triggers.html
row *************************** Trigger: ins_sum Event: INSERT Table: account Statement: SET @sum = @sum + NEW.amount Timing: BEFORE Created: 2018-08-08 10:10:12.61 sql_mode: ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES, NO_ZERO_IN_DATE,NO_ZERO_DATE, ...
https://dev.mysql.com/doc/refman/8.0/en/show.html
SHOW has many forms that provide information about databases, tables, columns, or status information about the server. The pattern is useful for restricting statement output to matching values. Several SHOW statements also accept a WHERE clause ...
https://dev.mysql.com/doc/refman/8.0/en/signal.html
Example: CREATE PROCEDURE p (divisor INT) BEGIN DECLARE divide_by_zero CONDITION FOR SQLSTATE '22012'; IF divisor = 0 THEN SIGNAL divide_by_zero; END IF; END; If the named condition does not exist in the scope of the SIGNAL statement, an Undefined ...SIGNAL provides error information to a handler, to an outer portion of the application, or to the ...
https://dev.mysql.com/doc/refman/8.0/en/source-configuration-options.html
-DSYSTEMD_PID_DIR=dir_name The name of the directory in which to create the PID file when MySQL is managed by systemd. -DREPRODUCIBLE_BUILD=bool For builds on Linux systems, this option controls whether to take extra care to create a build result ...
https://dev.mysql.com/doc/refman/8.0/en/symbolic-links-to-databases.html
On Unix, symlink a database using this procedure: Create the database using CREATE DATABASE: mysql> CREATE DATABASE mydb1; Using CREATE DATABASE creates the database in the MySQL data directory and permits the server to update the data dictionary ...Stop the server to ensure that no activity occurs in the new database while it is being ...
https://dev.mysql.com/doc/refman/8.0/en/temporary-files.html
For some statements, MySQL creates temporary SQL tables that are not hidden and have names that begin with #sql. Some SELECT queries creates temporary SQL tables to hold intermediate results. DDL operations that rebuild the table and are not ... On ...
https://dev.mysql.com/doc/refman/8.0/en/alter-event.html
ALTER [DEFINER = user] EVENT event_name [ON SCHEDULE schedule] [ON COMPLETION [NOT] PRESERVE] [RENAME TO new_event_name] [ENABLE | DISABLE | DISABLE ON SLAVE] [COMMENT 'string'] [DO event_body] The ALTER EVENT statement changes one or more of the ...When a user executes a successful ALTER EVENT statement, that user becomes the definer for the affected ...
https://dev.mysql.com/doc/refman/8.0/en/alter-table-generated-columns.html
CREATE TABLE t1 (c1 INT); ALTER TABLE t1 ADD COLUMN c2 INT GENERATED ALWAYS AS (c1 + 1) STORED; The data type and expression of generated columns can be modified. CREATE TABLE t1 (c1 INT, c2 INT GENERATED ALWAYS AS (c1 + 1) STORED); ALTER TABLE t1 ... ALTER TABLE operations permitted for generated columns are ADD, MODIFY, and ...
https://dev.mysql.com/doc/refman/8.0/en/alter-tablespace.html
Once a data file has been created, its size cannot be changed; however, you can add more data files to an NDB tablespace using additional ALTER TABLESPACE ... ADD DATAFILE is used with ENGINE = NDB, a data file is created on each Cluster data node, ...It can be used to add a new data file to, or to drop a data file from an NDB ...