[SERVER-56426] Fix $type expression behaviour for missing values in SBE Created: 28/Apr/21  Updated: 29/Oct/23  Resolved: 29/Apr/21

Status: Closed
Project: Core Server
Component/s: None
Affects Version/s: None
Fix Version/s: 5.0.0-rc0

Type: Bug Priority: Major - P3
Reporter: Nikita Lapkov (Inactive) Assignee: Nikita Lapkov (Inactive)
Resolution: Fixed Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Backwards Compatibility: Fully Compatible
Operating System: ALL
Sprint: Query Execution 2021-05-03
Participants:

 Description   

This bug was discovered from query fuzzer failure: https://spruce.mongodb.com/task/mongodb_mongo_master_enterprise_rhel_80_64_bit_dynamic_sbe_query_fuzzer_sharded_2_enterprise_rhel_80_64_bit_dynamic_sbe_patch_81b5cc9f6e318134cc73e087d5c60618c49e4fad_60873564e3c3311d0d2fca10_21_04_26_21_52_51/tests?execution=0&sortBy=STATUS&sortDir=ASC

Simplified repro:

db.test.drop()
db.test.insert({})
const results = db.test.find({a: {$not: {$type: 4}}}).toArray();
print(tojson(results));

Classic engine outputs single document in the collection, while SBE does not return any results.



 Comments   
Comment by Githook User [ 29/Apr/21 ]

Author:

{'name': 'Nikita Lapkov', 'email': 'nikita.lapkov@mongodb.com', 'username': 'laplab'}

Message: SERVER-56426 Fix $type expression behaviour for missing values in SBE
Branch: master
https://github.com/mongodb/mongo/commit/ade65ff718889aec8f60b4bedfa2c6e88c718ef2

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