Date comparators (sa, eb, ne, ap) for DateRangeParam

[Richard Wei]

Hi, 

I'd like to be able to support a search by date for a DateRangeParam type. Out of the prefixes defined here https://www.hl7.org/fhir/search.html#prefix, the following are considered unknown: `sa, eb, ne, ap`. 

On the  hapi.fhir.org server, these all return an Operation Outcome Error, where instead we'd expect a bundle.

• https://hapi.fhir.org/baseR4/Encounter?status=arrived&date=sa2020-05-25
  • returns diagnostic error: "Unknown comparator: STARTS_AFTER"
• https://hapi.fhir.org/baseR4/Encounter?status=arrived&date=eb2020-05-25
  • returns diagnostic error: "Unknown comparator: NOT_EQUALS"
• https://hapi.fhir.org/baseR4/Encounter?status=arrived&date=ne2020-05-25
  • returns diagnostic error: "Unknown comparator: ENDS_BEFORE"
• https://hapi.fhir.org/baseR4/Encounter?status=arrived&date=ap2020-05-25
• returns diagnostic error: "Unknown comparator: APPROXIMATE"
  
  

I'm currently using HAPI 5.1.0, but looking at HAPI 5.4.1 ca.uhn.fhir.rest.param.DateRangeParam#addParam does not handle these cases

Thanks!
Best,
Richard

[Richard Wei]

Hi,

Just following up here, I haven't found any answers related to this on the GitHub repo issues tab or within this group. Is there any guidance available for this? Am I missing something when it comes to supporting this?

Best,

Richard