Database

Option to prohibit a non-voting member from becoming a sync source of a voting member

Hi, Our proposition in a few words: add a replica set option to allow chained replication but with the following exception: a non-voting member cannot become a sync source of a voting member under any circumstance. This proposition would allow c...

Guest over 5 years ago in Database 0 Submitted

2 VOTE

We need to be able to use $[<identifier>] and "$setOnInsert" in the same command

I want to be able to have a maintain array of counters for a user through a single update statement. If the document containing array of counters does not exist, I want to add it. If it does exist, I want to increment the counter For example, thi...

Guest over 3 years ago in Database 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

Parallelize unionWith

Today $unionWith aggregation command is executed sequentially. EG first we query collection A and then collection B and then the union occurs. The process should be parallelized so the query part will run in parallel while the union will be done a...

Guest almost 2 years ago in Performance & Optimization 0 Submitted

1 VOTE

Scheduled stepdown for smoother primary election

Stepdown is a great tool that allows us to keep clusters operating smoothly. We use it for example when we want to perform some maintenance work on the host where the primary is currently running, to perform a rolling upgrade, and in many other ca...

Guest almost 2 years ago in Replication & Sharding 0 Submitted

1 VOTE

Write parts of database engine in ZIG

Zig is a zero-dependency, drop-in C/C++ compiler that supports cross-compilation out-of-the-box. Implementing some parts of MongoDB database engine core in ZIG might brings some performance improvements. https://ziglang.org/

Guest almost 2 years ago in Database 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

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 5 years ago in Database 0 Submitted

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