---
title: "MDQueryStop(_:)"
framework: coreservices
role: symbol
role_heading: Function
path: coreservices/1413077-mdquerystop
---

# MDQueryStop(_:)

Stops the query from generating more results.

## Declaration

```swift
func MDQueryStop(_ query: MDQuery!)
```

## Parameters

- `query`: The query.

## Discussion

Discussion Queries may be executed only once and cannot be restarted. The query will first complete processing any unprocessed results.do. That may trigger a progress notification, so be aware of that if you are stopping a query from within your progress note handler; that is, during this function, a recursive progress and/or finished notification might occur, which might recursively call your notification handler. It is safe to call this function recursively. You would call this function to stop a query that is generating way too many results to be useful, but still want to access the results that have come in so far. If a query is stopped before the gathering phase finishes, it will not report itself as finished, nor will it send out a finished notification.

## See Also

### Starting, Stopping and Pausing Queries

- [MDQueryExecute(_:_:)](coreservices/1413099-mdqueryexecute.md)
- [MDQueryDisableUpdates(_:)](coreservices/1413041-mdquerydisableupdates.md)
- [MDQueryEnableUpdates(_:)](coreservices/1413066-mdqueryenableupdates.md)
- [MDQueryIsGatheringComplete(_:)](coreservices/1413032-mdqueryisgatheringcomplete.md)