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Type: Task
Resolution: Fixed
Priority: Major - P3
Fix Version/s: 8.3.0-rc0
Affects Version/s: None
Component/s: None
Labels:
- bits-and-bobs-m3.3

Assigned Teams:

Query Integration
Backwards Compatibility:
Fully Compatible
CAR Domain/s:
None

Aha! Reference:
None
Tracking Level:
None
Risk Status:
None
Exec Notes:
None
Goal Name(s):
None
Goal Link:
None

This includes:

$unionWith on a view, with extension stage in the view definition
$unionWith on a view, with extension stage in the subpipeline
$unionWith in a view definition, with extension stage in the subpipeline
Nested combinations of the above

We should make sure to test a variety of extension stages, particularly one that desugars so we make sure the desugaring path is correct. We should also test to make sure the query shape serialization is correct for these pipelines.

Additionally, $queryStats tests for extensions in $unionWith should be tested.

depends on

SERVER-115937 Support extension stages in $unionWith

Closed

is duplicated by

SERVER-115786 Test a $unionWith using 'from: view' and 'pipeline: $extensionStage'

Closed

SERVER-115789 Enable nested $unionWiths to use 'from: view' and 'pipeline: $extensionStage'

Closed

SERVER-115790 Enable $unionWith+extension as part of a view definition

Closed

SERVER-117214 $queryStats tests for an extension stage in $unionWith

Closed

Assignee:: Josh Siegel
Reporter:: Will Buerger
Participants:: Githook User, Josh Siegel, Will Buerger
Votes:: 0 Vote for this issue
Watchers:: 2 Start watching this issue

Created:: Jan 14 2026 06:32:36 PM UTC
Updated:: Jan 23 2026 03:58:48 PM UTC
Resolved:: Jan 23 2026 03:58:48 PM UTC

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