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https://dev.mysql.com/doc/refman/8.0/en/log-destinations.html
To display the current structure of the log tables, use these statements: SHOW CREATE TABLE mysql.general_log; SHOW CREATE TABLE mysql.slow_log; Log contents are accessible through SQL statements. CREATE TABLE, ALTER TABLE, and DROP TABLE are valid ...Possible destinations for log entries are log files or the general_log and slow_log tables in the mysql system ... MySQL Server provides flexible ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-data-locks-table.html
In practice, InnoDB always creates an index (GEN_CLUST_INDEX), so INDEX_NAME is non-NULL for InnoDB tables. For information about which lock requests are blocked by which held locks, see Section 29.12.13.2, “The data_lock_waits Table”. row ...
https://dev.mysql.com/doc/refman/8.0/en/partitioning-columns-range.html
However, the order of the column names in the partitioning column list and the value lists does not have to be the same as the order of the table column definitions in the main part of the CREATE TABLE statement. In addition, changing the character ...As with table partitioned by RANGE, you can use MAXVALUE to represent a value such that any legal value inserted into a given column is always less than this ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-table-reference.html
The following table summarizes all available INFORMATION_SCHEMA tables. For greater detail, see the individual table descriptions. Table 28.1 INFORMATION_SCHEMA Tables Table Name Description Deprecated ADMINISTRABLE_ROLE_AUTHORIZATIONS Grantable ...
https://dev.mysql.com/doc/refman/8.0/en/sql-mode.html
Changing the server SQL mode after creating and inserting data into partitioned tables can cause major changes in the behavior of such tables, and could lead to loss or corruption of data. It is strongly recommended that you never change the SQL ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-temp-table-info-table.html
The INNODB_TEMP_TABLE_INFO table provides information about user-created InnoDB temporary tables that are active in an InnoDB instance. The INNODB_TEMP_TABLE_INFO table is created when first queried, exists only in memory, and is not persisted to ...It does not provide information about internal InnoDB temporary tables used by the ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-information-schema-temp-table-info.html
INNODB_TEMP_TABLE_INFO provides information about user-created InnoDB temporary tables that are active in the InnoDB instance. Create a simple InnoDB temporary table: mysql> CREATE TEMPORARY TABLE t1 (c1 INT PRIMARY KEY) ENGINE=INNODB; Query ...It ...
https://dev.mysql.com/doc/refman/8.0/en/replication-rules-table-options.html
The replica checks for and evaluates table options only if either of the following two conditions is true: No matching database options were found. When viewed in terms of events, the process of checking table options is the same for both row-based ...One or more database options were found, and were evaluated to arrive at an “execute” condition according to the rules described in the previous section (see Section 19.2.5.1, “Evaluation of Database-Level Replication and Binary Logging ...
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/invisible-columns.html
However, even if explicitly referenced, a column that is invisible in the existing table is visible in the new table: mysql> CREATE TABLE t1 (col1 INT, col2 INT INVISIBLE); mysql> CREATE TABLE t2 AS SELECT col1, col2 FROM t1; mysql> SHOW CREATE ...