number literal adaptions

2 files changed, 3 insertions, 2 deletions

diff --git a/bsfs/triple_store/sparql/parse_filter.py b/bsfs/triple_store/sparql/parse_filter.py
index 0297cbc..18a3288 100644
--- a/bsfs/triple_store/sparql/parse_filter.py
+++ b/bsfs/triple_store/sparql/parse_filter.py
@@ -242,7 +242,6 @@ class Filter():
         # predicate count expression (fetch number of predicates at *head*)
         num_preds = f'{{ SELECT (COUNT(distinct {inner}) as {outer}) WHERE {{ {head} {pred} {inner} }} }}'
         # count expression
-        # FIXME: We have to ensure that ns.xsd.integer is always known in the schema!
         count_bounds = self._parse_filter_expression(self.schema.literal(ns.xsd.integer), node.count, outer)
         # combine
         return num_preds + ' . ' + count_bounds
diff --git a/bsfs/triple_store/sparql/sparql.py b/bsfs/triple_store/sparql/sparql.py
index ddace35..87467ff 100644
--- a/bsfs/triple_store/sparql/sparql.py
+++ b/bsfs/triple_store/sparql/sparql.py
@@ -11,6 +11,7 @@ import rdflib
 
 # bsfs imports
 from bsfs import schema as bsc
+from bsfs.namespace import ns
 from bsfs.query import ast
 from bsfs.utils import errors, URI
 
@@ -94,7 +95,8 @@ class SparqlStore(base.TripleStoreBase):
         super().__init__(None)
         self._graph = rdflib.Graph()
         self._transaction = _Transaction(self._graph)
-        self._schema = bsc.Schema()
+        # NOTE: parsing bsfs.query.ast.filter.Has requires xsd:integer.
+        self._schema = bsc.Schema(literals={bsc.ROOT_NUMBER.child(ns.xsd.integer)})
         self._filter_parser = parse_filter.Filter(self._schema)
 
     # NOTE: mypy and pylint complain about the **kwargs not being listed (contrasting super)