> 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/error-codes/mariadb-error-codes-1000-to-1099/e1073.md).

# Error 1073: BLOB column can't be used in key specification with the used table type

| Error Code | SQLSTATE | Error                   | Description                                                                  |
| ---------- | -------- | ----------------------- | ---------------------------------------------------------------------------- |
| 1073       | 42000    | ER\_BLOB\_USED\_AS\_KEY | BLOB column '%s' can't be used in key specification with the used table type |

## Possible Causes and Solutions

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