> 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-4000-to-4099/e4078.md).

# Error 4078: Illegal parameter data types for operation

| Error Code | SQLSTATE | Error                                                | Description                                               |
| ---------- | -------- | ---------------------------------------------------- | --------------------------------------------------------- |
| 4078       |          | ER\_ILLEGAL\_PARAMETER\_DATA\_TYPES2\_FOR\_OPERATION | Illegal parameter data types %s and %s for operation '%s' |

## Possible Causes and Solutions

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