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Type: Task
Resolution: Fixed
Priority: Major - P3
Fix Version/s: 9.0.0-rc0
Affects Version/s: None
Component/s: None
Labels:

Assigned Teams:

Query Optimization
Backwards Compatibility:
Fully Compatible
Linked BF Score:
200
CAR Domain/s:
None

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

This could probably be split into two or three tickets once we start implementing this (one for implementing the document source, one for implementing the rewrite, one for adding the suite).

From the design:

We will introduce a new passthrough DocumentSource that holds a set of FieldPaths and asserts for every input document that none of the FieldPaths contain arrays. Additionally, we will introduce a new test-only rewrite (gated via a query knob) that inserts said DocumentSource before every stage. The rewrite will construct the set of field paths by looking at all fields referenced by the stage and adding them to the set if the graph reports canPathBeArray(stage, path) == false.

depends on

SERVER-127302 Dependency graph arrayness tracking incorrect for $lookup with sorted INLJ indexes

Closed

SERVER-127304 PathArrayness incorrectly marks parent field as non-array when index uses positional path notation

Closed

SERVER-128465 Fix dependency graph arrayness for dotted path modifications that array-traverse their prefix

Closed

SERVER-127292 Make $_internalValidateArrayness transparent to SBE pushdown

Backlog

SERVER-127305 Move $_internalValidateArrayness insertion to a Rule-Based Rewriter (RBR) rule

Backlog

SERVER-127290 $_internalValidateArrayness injection prevents $match pushdown, breaking {$meta: "indexKey"} in shred_documents.js

Closed

SERVER-128112 Add timeseries collection test coverage for $_internalAssertDataAssumptions in agg_stage_coverage.js

Closed

SERVER-128248 $unionWith sub-pipeline optimization runs without parent query settings

Closed

SERVER-128040 Add dependency graph validation jstest suite for product_limits

Closed

related to

SERVER-129904 Exclude lookup_query_stats.js from aggregation_dependency_graph_validation_passthrough suite

Closed

(4 depends on, 1 related to)

Assignee:: Matt Olma
Reporter:: Henri Nikku
Participants:: Githook User, Henri Nikku, Matt Olma, Mothra Jira Bot
Votes:: 0 Vote for this issue
Watchers:: 4 Start watching this issue

Created:: Apr 22 2026 04:10:14 PM UTC
Updated:: Jun 25 2026 03:46:01 PM UTC
Resolved:: Jun 18 2026 04:15:23 PM UTC

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