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mysql.help_relation Table

mysql.help_relation is one of the four tables used by the HELP command. It is populated when the server is installed by the fill_help_table.sql script. The other help tables are help_topic, help_category and help_keyword.

MariaDB starting with 10.4

In MariaDB 10.4 and later, this table uses the Aria storage engine.

MariaDB until 10.3

In MariaDB 10.3 and before, this table uses the MyISAM storage engine.

The mysql.help_relation table contains the following fields:

Field	Type	Null	Key	Default	Description
`help_topic_id`	`int(10) unsigned`	NO	PRI	`NULL`
`help_keyword_id`	`int(10) unsigned`	NO	PRI	`NULL`

Example

...
|           106 |             456 |
|           463 |             456 |
|           468 |             456 |
|           463 |             457 |
|           194 |             458 |
|           478 |             458 |
|           374 |             459 |
|           459 |             459 |
|            39 |             460 |
|            58 |             460 |
|           185 |             460 |
|           264 |             460 |
|           269 |             460 |
|           209 |             461 |
|           468 |             461 |
|           201 |             462 |
|           468 |             463 |
+---------------+-----------------+

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https://mariadb.com/kb/en/mysqlhelp_relation-table/