MAP = MAP comparison is not registered, but the comparison can still be executed.

[mxwli]

Code: (only works on the 3054-fix branch right now)

conn.execute("CREATE NODE TABLE tab(id int64, mp MAP(double, int64), mp2 MAP(int64, double), mp3 MAP(string, string), primary key(id))")
conn.execute(
        "MERGE (t:tab {id: 0, mp: $1, mp2: $2, mp3: $3}) RETURN t.*",
        {"1": {1.0: 5, 2: 3, 2.2: -1},
         "2": {5: -0.5, 4: -0.0, 0: 2.2},
         "3": {'a': '1', 'b': '2', 'c': '3'}})
conn.execute(
        "MATCH (t:tab) WHERE t.mp = map([1.0, 2.0, 2.2], [5, 3, -1]) RETURN t.*")

The comparison works, but MAP = MAP is not registered as a valid comparison. Interestingly, if we swap out the second map for a parameter in the last query

result = conn.execute(
        "MATCH (t:tab) WHERE t.mp = $1 RETURN t.*",
        {"1": {1.0: 5, 2: 3, 2.2: -1}})

The query throws the following exception:

RuntimeError: Parameter 1 has data type MAP(DOUBLE: INT64) but expects STRING.

indicating that there is likely a conversion to STRING before the map comparison is made.