Chained search by id does not discriminate resource type

[Andrzej-Pietrzak]

There seems to be a difference between how the 'regular' search syntax and the 'chained' syntax handles references that can contain different resource types.
e.g.:
Given Patient.generalpractitioner field that can contain references to Organizations or Practitioners, searching for Patients with certain Practitioner/Organization reference gives different results for different syntax:

SELECT fhir_truncate_storage('{"resourceType": "Patient"}');
SELECT fhir_truncate_storage('{"resourceType": "Organization"}');
SELECT fhir_truncate_storage('{"resourceType": "Practitioner"}');

SELECT fhir_create_resource('{"allowId":true,"resource":{"resourceType":"Organization","id":"f001","identifier":[{"use":"official","system":"systm1","value":"91654"},{"use":"usual","system":"systm1","value":"17-0112278"}],"type":{"coding":[{"system":"systm1","code":"V6","display":"University Medical Hospital"},{"system":"http://hl7.org/fhir/organization-type","code":"prov","display":"Healthcare Provider"}]},"name":"Burgers University Medical Center","telecom":[{"system":"phone","value":"022-655 2300","use":"work"}],"address":[{"use":"work","line":["Galapagosweg 91"],"city":"Den Burg","postalCode":"9105 PZ","country":"NLD"},{"use":"work","line":["PO Box 2311"],"city":"Den Burg","postalCode":"9100 AA","country":"NLD"}],"contact":[{"purpose":{"coding":[{"system":"http://hl7.org/fhir/contactentity-type","code":"PRESS"}]},"telecom":[{"system":"phone","value":"022-655 2334"}]},{"purpose":{"coding":[{"system":"http://hl7.org/fhir/contactentity-type","code":"PATINF"}]},"telecom":[{"system":"phone","value":"022-655 2335"}]}]}}');
SELECT fhir_create_resource('{"allowId":true,"resource":{"resourceType":"Organization","id":"f002","identifier":[{"use":"official","system":"systm2","value":"3125"},{"use":"usual","system":"systm2","value":"17321"}],"type":{"coding":[{"system":"systm1","code":"V6","display":"University Medical Hospital"},{"system":"http://hl7.org/fhir/organization-type","code":"prov","display":"Healthcare Provider"}]},"name":"Burgers University Medical Center","telecom":[{"system":"phone","value":"022-655 2300","use":"work"}],"address":[{"use":"work","line":["Galapagosweg 91"],"city":"Den Burg","postalCode":"9105 PZ","country":"NLD"},{"use":"work","line":["PO Box 2311"],"city":"Den Burg","postalCode":"9100 AA","country":"NLD"}],"contact":[{"purpose":{"coding":[{"system":"http://hl7.org/fhir/contactentity-type","code":"PRESS"}]},"telecom":[{"system":"phone","value":"022-655 2334"}]},{"purpose":{"coding":[{"system":"http://hl7.org/fhir/contactentity-type","code":"PATINF"}]},"telecom":[{"system":"phone","value":"022-655 6666"}]}]}}');
SELECT fhir_create_resource('{"allowId":true,"resource":{"resourceType":"Practitioner","id":"f001","identifier":[{"use":"official","system":"urn:oid:2.16.528.1.1007.3.1","value":"91654"},{"use":"usual","system":"urn:oid:2.16.840.1.113883.2.4.6.3","value":"129IDH4OP733"}],"name":{"use":"official","family":["van den broek"],"given":["Eric"],"suffix":["MD"]},"telecom":[{"system":"phone","value":"0205568263","use":"work"},{"system":"email","value":"[email protected]","use":"work"},{"system":"fax","value":"0205664440","use":"work"}],"address":[{"use":"work","line":["Galapagosweg 91"],"city":"Den Burg","postalCode":"9105 PZ","country":"NLD"}],"gender":"male","birthDate":"1975-12-07","practitionerRole":[{"managingOrganization":{"reference":"Organization/f001","display":"BMC"},"role":{"coding":[{"system":"urn:oid:2.16.840.1.113883.2.4.15.111","code":"01.000","display":"Arts"}],"text":"Care role"},"specialty":[{"coding":[{"system":"urn:oid:2.16.840.1.113883.2.4.15.111","code":"01.018","display":"Ear-, Nose and Throat"}],"text":"specialization"}]}]}}');

SELECT fhir_create_resource('{"allowId":true,"resource":{"id":"RitaGunn","name":[{"use":"official","given":["Rita"],"family":["Gunn"]}],"active":true,"generalPractitioner":[{"reference":"Practitioner/f001","display":"DocEric-Practitioner1"},{"reference":"Organization/f001","display":"Burgers-Organization1"}],"resourceType":"Patient"}}');
SELECT fhir_create_resource('{"allowId":true,"resource":{"id":"JamesDean","name":[{"use":"official","given":["James"],"family":["Dean"]}],"active":true,"generalPractitioner":[{"reference":"Organization/f001","display":"Burgers-Organization1"}],"resourceType":"Patient"}}');
SELECT fhir_create_resource('{"allowId":true,"resource":{"id":"MarkBlackstone","name":[{"use":"official","given":["Mark"],"family":["Blackstone"]}],"active":true,"generalPractitioner":[{"reference":"Organization/f002","display":"Burgers-Organization2"}],"resourceType":"Patient"}}');
SELECT fhir_create_resource('{"allowId":true,"resource":{"id":"DaveChappele","name":[{"use":"official","given":["David"],"family":["Chappele"]}],"active":true,"resourceType":"Patient"}}');

-- by any property:
SELECT fhir_search('{"resourceType": "Patient", "queryString": "general-practitioner:Organization.identifier=91654"}'); -- ok, got both patients
SELECT fhir_search('{"resourceType": "Patient", "queryString": "general-practitioner:Practitioner.identifier=91654"}'); -- ok, got only Rita

-- by id:
SELECT fhir_search('{"resourceType": "Patient", "queryString": "general-practitioner:Practitioner=f001"}'); -- nok, got both, expecting only Rita
SELECT fhir_search('{"resourceType": "Patient", "queryString": "general-practitioner:Organization=f001"}'); -- ok, got both 
-- comparing to regular syntax:
SELECT fhir_search('{"resourceType": "Patient", "queryString": "general-practitioner=Practitioner/f001"}'); -- ok, 1 patient
SELECT fhir_search('{"resourceType": "Patient", "queryString": "general-practitioner=Organization/f001"}'); -- ok, both patients