Data Modeling & Indexing

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Native Support for Date-Only and Time-Only Field Types

### Summary MongoDB currently lacks native field types for **date-only** (e.g., `2025-05-28`) and **time-only** (e.g., `13:45:00`) values. This results in frequent developer confusion, incorrect behavior around time zones, wasted storage, and the...

Guest 7 months ago in Data Modeling & Indexing 0 Submitted

3 VOTE

Validation should support default values

Various users feel that validation should support default values. See, for instance: https://www.mongodb.com/community/forums/t/support-default-value-in-schema-validation/319684 https://www.mongodb.com/community/forums/t/setting-default-values-in-...

Guest 10 months ago in Data Modeling & Indexing 0 Submitted

9 VOTE

Rename an existing index

Allow for the possibility of renaming an existing index, without having to drop and recreate it. Let us say a unique index exists in production, it might not be possible to safely drop it. Yet the index name might not be ideal.

Guest over 4 years ago in Data Modeling & Indexing 1 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 almost 3 years ago in Data Modeling & Indexing 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

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 over 4 years ago in Data Modeling & Indexing 0 Submitted

1 VOTE

Support default values in validation

Many MongoDB users feel that default values should be supported in validation. See, for example: https://www.mongodb.com/community/forums/t/setting-default-values-in-data-schema/8411 https://www.mongodb.com/community/forums/t/support-default-value...

Guest 10 months ago in Data Modeling & Indexing 0 Submitted

4 VOTE

Support readOnly in Json Schema Validation

Support the readOnly property for json schema validation to make certain fields immutable (or the entire document) after creation.

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

3 VOTE

Compound clustered index

Now it is possible to create a clustered index for only one field. Since documents can be arranged in ascending order of multiple fields, I see no reason to disallow a clustered index from being a compound. Expected syntax: ``` create_collection(...

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

3 VOTE

bloom filter index

https://www.percona.com/blog/2019/06/14/bloom-indexes-in-postgresql/ I think having an option to use bloom filter indexes could provide for better performance when compared to compound indexes and eliminate the need for having multiple indexes. I...

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

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