Complete (datatype) implementation

[aaj3f]

Description

We have pending tests for use of datatype in queries, but it appears implementation of this syntax isn't complete (it may require whitelisting the fn for use in bind and/or filter etc)

db/test/fluree/db/query/fql_test.clj

Lines 269 to 294 in 1507c85

	(deftest ^:integration ^:pending datatype-test
	(let [conn (test-utils/create-conn)
	ledger @(fluree/create conn "people")
	db @(fluree/stage
	(fluree/db ledger)
	{"@context" ["https://ns.flur.ee"
	test-utils/default-context
	{:ex "http://example.org/ns/"}]
	"insert"
	[{:id :ex/homer
	:ex/name "Homer"
	:ex/age 36}
	{:id :ex/bart
	:ex/name "Bart"
	:ex/age "forever 10"}]})]
	(testing "including datatype in query results"
	(let [query {:context [test-utils/default-context
	{:ex "http://example.org/ns/"}]
	:select '[?age ?dt]
	:where '[{:ex/age ?age}
	[:bind ?dt (datatype ?age)]]}
	results @(fluree/query db query)]
	(is (= [["forever 10" "xsd:string"] [36 "xsd:long"]]
	results))))
	(testing "filtering query results with datatype fn")
	(testing "filtering query results with @type value map")))

The tests describe three scenarios:

• "including datatype in query results" (via bind)
• "filtering query results with datatype fn"
• "filtering query results with @type value map"

We have a community-driven use case that requires this and so are prioritizing it