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Clustered Collection TTL on _id should support ObjectId.

Clustered Collections have the ability to expire on the _id field, this would be really helpful if it could use the timestamp portion of the ObjectId.

Guest over 3 years ago in Data Modeling & Indexing 0 Submitted

1 VOTE

$sort should allow 0 as argument meaning "no sort"

The $sort operator and aggregation stage should allow 0 (possibly also null) as an argument for the field sort order, meaning, "Don't sort." This allows a variable to be passed in that can conditionally skip the sort operation, in addition to the ...

Guest over 1 year ago in Querying & Aggregations 0 Submitted

2 VOTE

Support Two Array Fields in Compound Indexes

Hi, I've come across a lot of use cases where the business logic has demanded unique constraints on 1-2 fields that have been modeled as arrays on documents. The cases that only contain a single array field is already taken care of using unique i...

Guest over 3 years ago in Data Modeling & Indexing 0 Submitted

1 VOTE

Feature to perform Machine Learning predictive analysis and classification in MongoDB

I want to bring the machine learning compute and predictive analysis into MongoDB atlas. Instead of ETL my data out of Atlas to achieve this, I will reduce my architectural complexity by having an aggregation operator that does this on my document...

Guest almost 2 years ago in Querying & Aggregations 0 Submitted

2 VOTE

hint support for $graphLookup

Currently you can supply a `hint` to the `aggregation` call in order to tell MongoDB to use a specific index for the initial `$match`. But there is currently no way to specify which index to use for a `$graphLookup` later in the pipeline. I would...

Guest over 3 years ago in Querying & Aggregations 0 Submitted

1 VOTE

Add Relaxed mode support for the $out operator

Add Relaxed mode support for the $out operator. *and include as option in the existing drivers

Guest almost 2 years ago in Querying & Aggregations 0 Submitted

1 VOTE

Aggregations should allow an empty sort stage instead of returning an error

When you run an aggregation pipeline that contains an empty sort stage (like `{"$sort": {}}`) MongoDB returns the error message "$sort stage must have at least one sort key". It would be really helpful if such a stage would work and simply not app...

Guest almost 2 years ago in Querying & Aggregations 0 Submitted

3 VOTE

Automatic Indexes

MongoDB can already suggest useful indexes. Why not take the next step and allow MongoDB to autonomously create and manage indexes. Ideally it will automatically maintain the indexes over time as the structure and usage of the database changes.

Guest almost 6 years ago in Data Modeling & Indexing 1 Submitted

2 VOTE

Make it clear an index not on present on all shards

We recently had an issue where an index did not get created on all shards. When we ran getIndexes() on mongos it reported the index was present. So we dropped another redundant index thinking all would be well - it was not. We had serious performa...

Guest almost 4 years ago in Data Modeling & Indexing 0 Submitted

1 VOTE

TTL index activity statistics

Dear all, Presently, there is no visibility or tracking of TTL index activity: no data available to the user to see how much data and how often has been deleted. I suggest having a separate “dictionary” collection with statistics for all TTL inde...

Marina Sirota almost 2 years ago in Data Modeling & Indexing 0 Submitted

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