[Fiware-tech-help] QuantumLeap REST API support for TimescaleDB

[Taz Lodder]

Hi

For several reasons, I opted to use TimescaleDB over CrateDB for our FIWARE implementation, but I have only just found out that it's not possible to retrieve historical data through the QuantumLeap REST API.

I can retrieve a list of endpoints with:
$ curl http://localhost:8668/v2/
{
  "attributes_url": "/v2/attrs",
  "entities_url": "/v2/entities",
  "notify_url": "/v2/notify",
  "subscriptions_url": "/v2/subscriptions",
  "types_url": "/v2/types"
}

but disappointingly no results from any other requests, eg:
$ curl http://localhost:8668/v2/entities/urn:ngsi-ld:Entity:0001
{
  "description": "No records were found for such query.",
  "error": "Not Found"
}

 and even just an entity list is empty:
$ curl http://localhost:8668/v2/entities
{
  "description": "No records were found for such query.",
  "error": "Not Found"
}

I then spotted this "At the moment, QuantumLeap implement experimental querying of data through the QuantumLeap REST API. This means that while REST API on top of CrateDB have been tested in production, this is not the case for Timescale" in the docs https://quantumleap.readthedocs.io/en/latest/.

So my questions are:
1. Is there a roadmap as to when TimescaleDB is going to be supported by the QuantumLeap REST API?
2. Would it help expedite things if we were to support your development by doing some beta testing along the way?

We really are interested in using the QuantumLeap API for retrieving historical data.

Kind regards
Taz
Chalmers University of Technology

<http://www.chalmers.se>

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