> For the complete documentation index, see [llms.txt](https://mariadb.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mariadb.com/docs/server/reference/system-tables/the-mysql-database-tables/spider-mysql-database-tables/mysql-spider_table_crd-table.md).

# mysql.spider\_table\_crd Table

The `mysql.spider_table_crd` table is installed by the [Spider storage engine](/docs/server/server-usage/storage-engines/spider.md).

This table uses the [Aria](/docs/server/server-usage/storage-engines/aria.md) 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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