Database

Validation for referential integrity

Currently, with the JSON Schema validation, we are able to limit the values for a field using enumerations. However, we need to have a way to limit the values to those entered in another collection.

Guest over 6 years ago in Database 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 about 4 years ago in Querying & Aggregations 0 Submitted

3 VOTE

geoIntersects feature for 2D index

At Airbus, we would like to use geoIntersects feature with 2D Index. We don't need 2DSphere Index, but we have to use it if we want to have geoIntersects avalaible. As a consequence, we have to manage Spherical margins which introduces a useless a...

Guest over 6 years ago in Database 1 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 over 6 years ago in Data Modeling & Indexing 1 Future Consideration

1 VOTE

Is there any limitation on size of query in pipeline (character in query, not data)

I have an aggregate query, when the character in pipeline over 21066 character, the result return wrong format that the pipeline expected. So I wonder is there any limitation on size of query in pipeline? My case is: Query: [ "$match":{"profileI...

Guest about 2 years ago in Querying & Aggregations 0 Submitted

1 VOTE

Support concise correlated queries for $graphLookUp

Similar to $lookUp, support concise correlated queries for $graphLookUp. It would allow adding a $project stage to reduce overhead.

Guest about 2 years ago in Querying & Aggregations 0 Submitted

1 VOTE

Capture pre-images for ONLY specified change events

Currently, pre-images are captured for all updates, replacements and deletes on a given collection. Ask: Enable capture of pre-images for ['DELETED', ...] documents only. Context: A customer uses a collection for ingestion, where 16-20M do...

Guest about 2 years ago in Database 2 Submitted

1 VOTE

upgrade src/third_party/gperftools ≥ 2.10

gperftools new version support new architecture

Guest about 2 years ago in Database 0 Submitted

2 VOTE

Use dedicated interface for replication and balancing

Like many other big database system, MongoDB may support to specify dedicated interfaces for replication and/or for the balancer (sharding) Currently you can configure replication sets and shards members only by single hostname/IP-Address, i.e. *...

Wernfried Domscheit over 4 years ago in Replication & Sharding 0 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 over 4 years ago in Data Modeling & Indexing 0 Submitted

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