mysql.spider_table_crd Table
The mysql.spider_table_crd table is installed by the Spider storage engine.
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.
It contains the following fields:
| Field | Type | Null | Key | Default | Description |
|---|---|---|---|---|---|
| db_name | char(64) | NO | PRI | ||
| table_name | char(199) | NO | PRI | ||
| key_seq | int(10) unsigned | NO | PRI | 0 | |
| cardinality | bigint(20) | NO | 0 |
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https://mariadb.com/kb/en/mysqlspider_table_crd-table/