Query using bigint attribute return empty for certain values - datomic

Question

I created a minimal entity with one attribute of bigint type, my problem is that the query fail for certain values; this is the schema:
[{:db/ident :home/area,
:db/valueType :db.type/bigint,
:db/cardinality :db.cardinality/one,
:db/doc "the doc",
:db.install/_attribute :db.part/db,
:db/id #db/id[:db.part/db -1000013]}]
I inserted a sample value:
(d/transact (d/connect uri2)
[{
:db/id #db/id[:db.part/user]
:home/area 123456789000000N}
])
And confirmed that It was created by using the datomic console. It happens that the following query doesn’t return the entity previously inserted, as expected:
(d/q '[
:find ?e
:in $ ?h
:where
[?e :home/area ?h]]
(d/db (d/connect uri2))
123456789000000N
)
;;--- #{}
Maybe I’m missing something in the way the value is expressed. Another test using a different value like 100N for the attribute :home/area returns the correct answer:
(d/transact (d/connect uri2)
[{
:db/id #db/id[:db.part/user]
:home/area 100N}
])
(d/q '[
:find ?e
:in $ ?h
:where
[?e :home/area ?h]]
(d/db (d/connect uri2))
100N
)
;;-- #{[17592186045451]}
Also works fine with the value 111111111111111111111111111111111111N which is confusing to me.
Datomic version: "0.9.5390" java version "1.8.0_05" Java(TM) SE
Runtime Environment (build 1.8.0_05-b13) Java HotSpot(TM) 64-Bit
Server VM (build 25.5-b02, mixed mode) MySQL as Storage service
Thanks in advance for any any suggestions.

Answer 1

To Clojure users, the name :db.type/bigint can be misleading, since it actually maps to java.math.BigInteger, not clojure.lang.BigInt.
I reproduced the same steps and I can't tell you why the Datalog query fails on 123456789000000N but not 100N and 111111111111111111111111111111111111N. It seems however that the following always works:
(d/q '[
:find ?e
:in $ ?h
:where
[?e :home/area ?h]]
(d/db (d/connect uri2))
(.toBigInteger 100N)
)

Answer 2

I ran your example and got different results (it worked in all cases). I am not sure why, but maybe adding my example will help. The only changes I made were to use uri instead of uri2, I slurped the schema, and I performed a (def conn (d/connect uri)) and a (d/create-database uri). I assume you performed similar steps, which is why I don't know why my example worked:
Clojure 1.8.0
user=> (use '[datomic.api :only [q db] :as d])
nil
user=> (use 'clojure.pprint)
nil
user=> (def uri "datomic:mem://bigint")
#'user/uri
user=> (d/create-database uri)
true
user=> (def conn (d/connect uri))
#'user/conn
user=> (def schema-tx (read-string (slurp "path/to/the/schema.edn")))
#'user/schema-tx
user=> #(d/transact conn schema-tx)
{:db-before datomic.db.Db#b8774875,
:db-after datomic.db.Db#321a2712,
:tx-data [#datom[13194139534312 50 #inst "2016-08-14T18:53:23.158-00:00" 13194139534312 true]
#datom[63 10 :home/area 13194139534312 true] #datom[63 40 60 13194139534312 true]
#datom[63 41 35 13194139534312 true] #datom[63 62 "the doc" 13194139534312 true]
#datom[0 13 63 13194139534312 true]],
:tempids {-9223367638809264717 63}}
(d/transact (d/connect uri)
[{
:db/id #db/id[:db.part/user]
:home/area 123456789000000N}
])
#object[datomic.promise$settable_future$reify__6480 0x5634d0f4
{:status :ready, :val {:db-before datomic.db.Db#321a2712,
:db-after datomic.db.Db#f6ef3cd8,
:tx-data [#datom[13194139534313 50 #inst "2016-08-14T18:53:34.325-00:00" 13194139534313 true]
#datom[17592186045418 63 123456789000000N 13194139534313 true]],
:tempids {-9223350046623220288 17592186045418}}}]
(d/q '[
:find ?e
:in $ ?h
:where
[?e :home/area ?h]]
(d/db (d/connect uri))
123456789000000N
)
#{[17592186045418]}
(d/transact (d/connect uri)
[{
:db/id #db/id[:db.part/user]
:home/area 100N}
])
#object[datomic.promise$settable_future$reify__6480 0x3b27b497
{:status :ready, :val {:db-before datomic.db.Db#f6ef3cd8,
:db-after datomic.db.Db#2385c058,
:tx-data [#datom[13194139534315 50 #inst "2016-08-14T18:54:13.347-00:00" 13194139534315 true]
#datom[17592186045420 63 100N 13194139534315 true]],
:tempids {-9223350046623220289 17592186045420}}}]
(d/q '[
:find ?e
:in $ ?h
:where
[?e :home/area ?h]]
(d/db (d/connect uri))
100N
)
#{[17592186045420]}
user=>
Can you run (first schema-tx) on the REPL line to confirm your schema transacted? I noticed you were using the console and I am wondering if /bigint did not get defined or you were looking at the first uri (since I noticed you had a 2, I am assuming you have multiple examples).