[Feature][BanyanDB] Support for Retrieving Data from Multiple Groups in a Single Query

[hanahmily]

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• I had searched in the issues and found no similar feature requirement.

Description

In BanyanDB, different versions of a dataset or schema changes are often handled by creating new groups. This approach isolates data but can complicate queries across schema versions. Suppose users need to access data across different groups (such as during a schema migration or when querying historical data alongside current data). In that case, they must perform separate queries for each group and manually merge the results.

BanyanDB should support retrieving data from multiple groups in a single query. This feature simplifies client code, reduces latency, and ensures consistency across queried groups. The syntax could be extended to allow specifying multiple group names in a query

message QueryRequest {
  string name = 1
  repeated string groups = 2
...
}

Use case

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Related issues

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Are you willing to submit a pull request to implement this on your own?

• Yes I am willing to submit a pull request on my own!

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