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Allow descriptions for $expr sections in DB validation

What problem are you trying to solve? Focus on the what and why of the need you have, not the how you'd like it solved. Our collection has some complex $expr rules for validating our collection. Unfortunately, $expr does not allow us to add a...

Habibullah Aslam 5 months ago in Data Modeling & Indexing / Querying & Aggregations 1 Will Not Implement

11 VOTE

geoContain

Dear all, according to the attached image, I have some documents (in blue, with id from 1 to 5) having a geographic extent and a search area (in yellow). I need to find all documents where search area is completly inside the document's geometry. U...

Guest almost 5 years ago in Querying & Aggregations 0 Submitted

6 VOTE

Extend schema validation to be able to enforce referential integrity between collections

Where a relational database uses 2 tables to store a 1:many "parent - child" relationship between entities, MongoDB mostly stores the child documents in an array file as part of the parent document. This automatically ensures referential integrity...

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

6 VOTE

Support compound/multiple grouping keys in $bucket

We often need to compute statistical/summarizing aggregations grouped by more than one field where all fields are of a $bucket-able type. An example, would be to count all orders grouped by their status and some custom time ranges of their creati...

Guest about 3 years ago in Querying & Aggregations 0 Submitted

2 VOTE

Leveraging Group By/Distinct Query to use regular Index

When using Group By or Distinct queries on database, provide the ability to leverage existing index i.e these queries today will miss using existing index db.collection.distinct("field") db.collection.aggregate([ { $group: { _id: "$category", ...

Guest about 1 year ago in Querying & Aggregations 0 Submitted

6 VOTE

`$getField` to work with a dynamic `field`

Currently `$getField` works only when `field` resolves at query-compile-time to a string. It would be nice if it worked also when `field` resolves to a string at *runtime*. See this Jira ticket - https://jira.mongodb.org/browse/SERVER-67030

Guest almost 4 years ago in Querying & Aggregations 0 Submitted

3 VOTE

TTL index throttling for deletion

To avoid deletion impact, we need to control the quantity and speed of document generations(insert). Need a way to throttle down the deletion quantity per a delete operation. i.e. # of documents per a ttl delete, sleep time between deletions(defa...

Guest over 2 years ago in Data Modeling & Indexing 0 Submitted

3 VOTE

support parallel query executions include find(), aggregation()

To use multi-core environment and enhance the query performance w/ a large amount of documents, need a parallel execution. Sharding or microsharding is not an alternative in this case.

Guest over 2 years ago in Querying & Aggregations 0 Submitted

6 VOTE

Add expression indexes

An expression index is one where the value being indexed is the result of an expression, like lower casing a string. http://en.wikipedia.org/wiki/Expression_index http://www.postgresql.org/docs/8.1/static/indexes-expressional.html

Guest almost 5 years ago in Data Modeling & Indexing 0 Submitted

3 VOTE

define the random seed manually, for $rand and $sample

It will be great if an additional paramater to define the seed for $rand and $sample could be use.

Guest over 2 years ago in Querying & Aggregations 1 Submitted

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