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https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-replication-schema.html
0 in the epoch column of this table indicates a transaction originating from a storage engine other than NDB. The number of epochs per binary log file normally depends on the amount of binary log generated per epoch and the size of the binary log ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-command-options.html
This option is on by default, which enables database, table, and column name completion. (This applies to statements terminated by ; or \G.) --batch, -B Command-Line Format --batch Print results using tab as the column separator, with each row on a ... mysql supports the following options, which can be specified on the command line or in the [mysql] and [client] groups of an option ...
https://dev.mysql.com/doc/refman/5.7/en/grant-tables.html
Each grant table contains scope columns and privilege columns: Scope columns determine the scope of each row in the tables; that is, the context in which the row applies. Similarly, a db table row with Host, User, and Db column values of ... The ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-compression-internals.html
Each row in the index node contains the values of the (user-specified or system-generated) primary key and all the other columns of the table. The pointer is in fact the value of the primary key of the table, which is used to access the clustered ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-what-is-new-7-5.html
The config_params table has been made read-only, and has been enhanced with additional columns providing information about each configuration parameter, including the parameter's type, default value, maximum and minimum values (where applicable), a ... Major changes and new features in NDB Cluster 7.5 which are likely to be of interest are shown in the following list: ndbinfo ...
https://dev.mysql.com/doc/refman/5.7/en/converting-tables-to-innodb.html
autocommit=1 is suitable for InnoDB tables when running a sequence of queries for generating reports or analyzing statistics. File-per-table tablespaces also support the Barracuda file format and associated features such as table compression, ... If ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-ndbinfo-memory-per-fragment.html
Every row having one or more variable-sized, one or more dynamic columns (or both) has a variable-sized part. Each row in an NDB table has a fixed-size part, consisting of a row header, and one or more fixed-size columns. The total free space ...
https://dev.mysql.com/doc/refman/5.7/en/group-by-modifiers.html
ROLLUP has a more complex effect when there are multiple GROUP BY columns. In this case, each time there is a change in value in any but the last grouping column, the query produces an extra super-aggregate summary row. These rows have the country ... The GROUP BY clause permits a WITH ROLLUP modifier that causes summary output to include extra rows that represent higher-level (that is, super-aggregate) summary ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-memcached-troubleshoot.html
These limits primarily apply if you intend to create an index on a value column to run report-generating queries on that column using SQL. loose-daemon_memcached_option='-vvv' If columns specified to hold memcached values are the wrong data type, ...
https://dev.mysql.com/doc/refman/5.7/en/myisam-storage-engine.html
See Section 4.5.3, “mysqlcheck — A Table Maintenance Program”, Section 4.6.3, “myisamchk — MyISAM Table-Maintenance Utility”, and Section 4.6.5, “myisampack — Generate Compressed, Read-Only MyISAM Tables”. Also, the code in the ...