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https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-dictionary-tables.html
dictionary_tables contains the columns listed here: table_id The table' unique ID database_name Name of the database containing the table table_name Name of the table status The table status; one of New, Changed, Retrieved, Invalid, or Altered.
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-event-tables.html
In addition, when events end, the Performance Schema can store them in history tables. For each event type, the Performance Schema uses three tables for storing current and historical events. The tables have names of the following forms, where xxx ... For wait, stage, statement, and transaction events, the Performance Schema can monitor and store current ...
https://dev.mysql.com/doc/refman/8.0/en/table.html
TABLE can also be used in many cases in place of the SELECT in CREATE TABLE ... TABLE is a DML statement introduced in MySQL 8.0.19 which returns rows and columns of the named table. Given the existence of a table named t, the following two ...See ...
https://dev.mysql.com/doc/refman/8.0/en/myisamchk.html
The myisamchk utility gets information about your database tables or checks, repairs, or optimizes them. myisamchk works with MyISAM tables (tables that have .MYD and .MYI files for storing data and indexes). You can also use the CHECK TABLE and ...
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 Introduced Deprecated ADMINISTRABLE_ROLE_AUTHORIZATIONS ...
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/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/innodb-compression-tuning.html
For example: USE test; SET GLOBAL innodb_file_per_table=1; SET GLOBAL autocommit=0; -- Create an uncompressed table with a million or two rows. \! ls -l data/test/big_table.ibd CREATE TABLE key_block_size_4 LIKE big_table; ALTER TABLE ...However, ...
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/performance-schema-threads-table.html
If the thread spawns a subthread, matching occurs again for the threads table row created for the subthread. If the thread spawns a subthread, matching occurs again for the threads table row created for the subthread. The threads table contains a ...Each row contains information about a thread and indicates whether monitoring and historical event logging are enabled for it: mysql> SELECT * FROM performance_schema.threads\G *************************** ...