---
title: Query extension samples
slug: '1444'
canonical_url: https://docs.coveo.com/en/1444/
collection: build-a-search-ui
source_format: adoc
---
# Query extension samples

Here are some sample use cases for [query extensions](https://docs.coveo.com/en/1397/).

## Service and support

The following samples would be used in a [Coveo for Salesforce](https://docs.coveo.com/en/1404/) [Insight Panel](https://docs.coveo.com/en/1143/).

### Next issue avoidance

* Returns parent cases of related cases:

```javascript
(NOT @syssfid=={!>id})
(NOT @syssfcaseid=={!>id})
​
{{relatedCases = @objecttype=="Case" $some(keywords: '{!>Subject}', match:1) @sfparentcasenumber $correlateResultSet(resultSet: @syssfid=={!Id}, field: '@sysconcepts', maximumValues: '25', modifier: '1000')}} <1>
​
$valuesToResultSet(values: $valuesOfField(field: '@sfparentcasenumber', resultSet: {{relatedCases}}), field: '@sfcasenumber') <2>
```

<1> Get the parent cases.

<2> Extract the parent cases from the related cases.

* Returns knowledge docs related to parent cases of related cases:

```javascript
(NOT @syssfid=={!>id})
(NOT @syssfcaseid=={!>id})
​
{{relatedCases = @objecttype=="Case" $some(keywords: '{!>Subject}', match:1) @sfparentcasenumber $correlateResultSet(resultSet: @syssfid=={!Id}, field: '@sysconcepts', maximumValues: '25', modifier: '1000')}} <1>
​
{{parentCases = $valuesToResultSet(values: $valuesOfField(field: '@sfparentcasenumber', resultSet: {{relatedCases}}), field: '@sfcasenumber' )}} <2>
​
$some(keywords:$removeStopWords(keywords:$anyKeywords(keywords:$valuesOfField(field: '@title', resultSet: {{parentCases}})))) <3>
```

<1> Extract related cases.

<2> Extract parent cases of related cases.

<3> Find some relevant knowledge.