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https://dev.mysql.com/doc/refman/8.0/en/performance-schema-replication-tables.html
This is similar to the information available from the SHOW REPLICA STATUS statement, but representation in table form is more accessible and has usability benefits: SHOW REPLICA STATUS output is useful for visual inspection, but not so much for ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-option-tables.html
ndb-allow-copying-alter-table: Set to OFF to keep ALTER TABLE from using copying operations on NDB tables. ndb_read_backup: Enable read from any replica for all NDB tables; use NDB_TABLE=READ_BACKUP={0|1} with CREATE TABLE or ALTER TABLE to enable ...ndb-default-column-format: Use this value (FIXED or DYNAMIC) by default for COLUMN_FORMAT and ROW_FORMAT options when creating or adding table ... The following list ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-partitions-table.html
PARTITION_EXPRESSION The expression for the partitioning function used in the CREATE TABLE or ALTER TABLE statement that created the table's current partitioning scheme. Each row in this table corresponds to an individual partition or subpartition ...PARTITION_ORDINAL_POSITION All partitions are indexed in the same order as they are defined, with 1 being the number assigned to the first ...
https://dev.mysql.com/doc/refman/8.0/en/create-table-gipks.html
To make the generated invisible primary key on auto_1 visible, execute this ALTER TABLE statement: mysql> ALTER TABLE auto_1 ALTER COLUMN my_row_id SET VISIBLE; Query OK, 0 rows affected (0.02 sec) Records: 0 Duplicates: 0 Warnings: 0 mysql> SHOW ...
https://dev.mysql.com/doc/refman/8.0/en/with.html
A common table expression (CTE) is a named temporary result set that exists within the scope of a single statement and that can be referred to later within that statement, possibly multiple times. Common Table Expressions Recursive Common Table ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-limitations-syntax.html
Trying either to create a temporary table that uses the NDB storage engine or to alter an existing temporary table to use NDB fails with the error Table storage engine 'ndbcluster' does not support the create option 'TEMPORARY'. CREATE TABLE and ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-table-handles-table.html
The Performance Schema exposes table lock information through the table_handles table to show the table locks currently in effect for each opened table handle. This information shows which table handles the server has open, how they are locked, and ...The value is one of READ, READ WITH SHARED LOCKS, READ HIGH PRIORITY, READ NO INSERT, WRITE ALLOW WRITE, WRITE CONCURRENT INSERT, WRITE LOW PRIORITY, or ...
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/innodb-compression-tuning.html
\! ls -l data/test/big_table.ibd CREATE TABLE key_block_size_4 LIKE big_table; ALTER TABLE key_block_size_4 key_block_size=4 row_format=compressed; INSERT INTO key_block_size_4 SELECT * FROM big_table; commit; -- Check how much space is needed for a ...However, because the efficiency of compression depends on the nature of your data, you can make decisions that affect the performance of compressed tables: Which tables to ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-compression-syntax-warnings.html
SQL Compression Syntax Warnings and Errors for File-Per-Table Tablespaces When innodb_strict_mode is enabled (the default), specifying ROW_FORMAT=COMPRESSED or KEY_BLOCK_SIZE in CREATE TABLE or ALTER TABLE statements produces the following error if ... This section describes syntax warnings and errors that you may encounter when using the table compression feature with file-per-table tablespaces and general ...