# jsonextractkey

Extracts all matched JSON field keys based on 'jsonPath' into a STRING\_ARRAY.

## Signature

> JSONEXTRACTKEY(jsonField, 'jsonPath')

| Arguments    | Description                                                                                            |
| ------------ | ------------------------------------------------------------------------------------------------------ |
| `jsonField`  | An **Identifier**/**Expression** contains JSON documents.                                              |
| `'jsonPath'` | Follows [JsonPath Syntax](https://goessner.net/articles/JsonPath/) to read values from JSON documents. |

{% hint style="warning" %}
**`'jsonPath'`**\` is a literal. Pinot uses single quotes to distinguish them from **identifiers**.
{% endhint %}

## Usage Examples

The examples in this section are based on the [Batch JSON Quick Start](https://docs.pinot.apache.org/release-1.0.0/basics/getting-started/quick-start#batch-json). In particular we'll be querying the row `WHERE id = 7044874109`.

```sql
select id, repo, JSONEXTRACTKEY(repo, '$.*') AS keys
from githubEvents 
WHERE id = 7044874109
```

| id         | repo                                                                                             | keys                         |
| ---------- | ------------------------------------------------------------------------------------------------ | ---------------------------- |
| 7044874109 | {"id":115911530,"name":"LimeVista/Tapes","url":"<https://api.github.com/repos/LimeVista/Tapes"}> | `$['id'],$['name'],$['url']` |


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.pinot.apache.org/release-1.0.0/configuration-reference/functions/jsonextractkey.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.