# ColumnNotFoundError

> **Class** in `langchain_community`

📖 [View in docs](https://reference.langchain.com/python/langchain-community/document_loaders/rocksetdb/ColumnNotFoundError)

Column not found error.

## Signature

```python
ColumnNotFoundError(
    self,
    missing_key: str,
    query: str,
)
```

## Extends

- `Exception`

## Constructors

```python
__init__(
    self,
    missing_key: str,
    query: str,
)
```

| Name | Type |
|------|------|
| `missing_key` | `str` |
| `query` | `str` |


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[View source on GitHub](https://github.com/langchain-ai/langchain-community/blob/4b280287bd55b99b44db2dd849f02d66c89534d5/libs/community/langchain_community/document_loaders/rocksetdb.py#L13)