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> db.test.find() { "_id" : ..., "a" : [ ] } { "_id" : ..., "a" : [ 1, 2, 3 ] } { "_id" : ..., "a" : [ {c: 1} ] } [Classic Engine] > db.test.find({a: {$not: {$elemMatch: {b: 1}}}}).toArray() [ { "_id" : ..., "a" : [ ] }, { "_id" : ..., "a" : [ 1, 2, 3 ] }, { "_id" : ..., "a" : [ {c: 1} ] } ] [SBE] > db.test.find({a: {$not: {$elemMatch: {b: 1}}}}).toArray() [ ]

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xgen-internal-githook commented on Sat, 13 Mar 2021 06:03:05 +0000: Author: {'name': 'Drew Paroski', 'email': 'drew.paroski@mongodb.com', 'username': 'paroski'} Message: SERVER-54332 [SBE] $elemMatch with object filter returns no documents Branch: master https://github.com/mongodb/mongo/commit/a90fee27ae85894ae6e4522251fe0ea35ef473c7 xgen-internal-githook commented on Fri, 12 Mar 2021 13:48:09 +0000: Author: {'name': 'Sviatlana Zuiko', 'email': 'sviatlana.zuiko@mongodb.com', 'username': 'szuiko'} Message: Revert "SERVER-54332 [SBE] $elemMatch with object filter returns no documents" This reverts commit 8b8c06cf8551ac34943cf81ab89dbf97ce8acd98. Branch: master https://github.com/mongodb/mongo/commit/64aaf4f7d91fdd53f9adf3f233da5664ffcff183 xgen-internal-githook commented on Fri, 12 Mar 2021 01:18:51 +0000: Author: {'name': 'Mickey. J Winters', 'email': 'mickey.winters@mongodb.com', 'username': 'mjrb'} Message: SERVER-54332 [SBE] $elemMatch with object filter returns no documents Branch: master https://github.com/mongodb/mongo/commit/8b8c06cf8551ac34943cf81ab89dbf97ce8acd98

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