---
title: SearchQueryMatchKeyNullExpressionPayload type | Wartiva API
description: A test for whether a key has any value: the output mirror of SearchQueryMatchKeyNullExpressionInput. Wartiva GraphQL API reference with examples.
url: https://wartiva.com/api-docs/types/search-query-match-key-null-expression-payload.html
updated: 2026-10-07
---

Graph search · GraphQL type

# `SearchQueryMatchKeyNullExpressionPayload` type

A test for whether a key has any value: the output mirror of [SearchQueryMatchKeyNullExpressionInput](https://wartiva.com/api-docs/types/search-query-match-key-null-expression-input.html).

## Fields

| Field Name | Description |
|---|---|
| `key` - [`String!`](https://wartiva.com/api-docs/types/string.html) | The dot-notation key naming the object type and field whose presence was tested. |
| `operator` - [`SearchMatchValueOperator!`](https://wartiva.com/api-docs/types/search-match-value-operator.html) | The comparison operator: EQ tested "is null", NE tested "is not null". |

## Used by

- [`SearchQueryExpressionPayload`](https://wartiva.com/api-docs/types/search-query-expression-payload.html) type: Output mirror of SearchQueryExpressionInput, echoing a structured where clause back on GraphSearchQueryInputPayload.

## Example

### Example

```json
{"key": "xyz789", "operator": "EQ"}

```

---

Wartiva is in early access. Request access: https://wartiva.com/early-access.html  
All pages: https://wartiva.com/llms.txt