diff --git a/jans-pycloudlib/jans/pycloudlib/persistence/spanner.py b/jans-pycloudlib/jans/pycloudlib/persistence/spanner.py
index 95dc9c0f80c..2eec8b0145d 100644
--- a/jans-pycloudlib/jans/pycloudlib/persistence/spanner.py
+++ b/jans-pycloudlib/jans/pycloudlib/persistence/spanner.py
@@ -293,6 +293,9 @@ def _transform_value(self, key: str, values: _t.Any) -> _t.Any:
         """
         type_ = self.sql_data_types.get(key, {})
 
+        if not type_:
+            type_ = self.sql_json_types.get(key, {})
+
         if not type_:
             attr_syntax = self.get_attr_syntax(key)
             type_ = self.sql_data_types_mapping[attr_syntax]
diff --git a/jans-pycloudlib/jans/pycloudlib/persistence/sql.py b/jans-pycloudlib/jans/pycloudlib/persistence/sql.py
index 35a38c91987..75495ce3584 100644
--- a/jans-pycloudlib/jans/pycloudlib/persistence/sql.py
+++ b/jans-pycloudlib/jans/pycloudlib/persistence/sql.py
@@ -171,7 +171,7 @@ def doc_id_from_dn(dn: str) -> str:
 
     if doc_id == "jans":
         doc_id = "_"
-    return doc_id
+    return doc_id  # noqa: R504
 
 
 class SqlSchemaMixin:
@@ -180,11 +180,10 @@ class SqlSchemaMixin:
     @property
     def schema_files(self) -> list[str]:
         """Get list of schema files."""
-        files = [
+        return [
             "/app/schema/jans_schema.json",
             "/app/schema/custom_schema.json",
         ]
-        return files
 
     @cached_property
     def sql_data_types(self) -> dict[str, dict[str, _t.Any]]:
@@ -221,6 +220,20 @@ def opendj_attr_types(self) -> dict[str, str]:
         with open("/app/static/rdbm/opendj_attributes_syntax.json") as f:
             return json.loads(f.read())  # type: ignore
 
+    @cached_property
+    def sql_json_types(self):
+        json_types = {}
+        for attr_type in self.attr_types:
+            for attr in attr_type["names"]:
+                if not attr_type.get("rdbm_json_column"):
+                    continue
+                json_types[attr] = {
+                    "mysql": {"type": "JSON"},
+                    "pgsql": {"type": "JSONB"},
+                    "spanner": {"type": "ARRAY<STRING(MAX)>"},
+                }
+        return json_types
+
     def get_attr_syntax(self, attr: str) -> str:
         """Get attribute syntax.
 
@@ -460,6 +473,9 @@ def _transform_value(self, key: str, values: _t.Any) -> _t.Any:
         """
         type_ = self.sql_data_types.get(key, {})
 
+        if not type_:
+            type_ = self.sql_json_types.get(key, {})
+
         if not type_:
             attr_syntax = self.get_attr_syntax(key)
             type_ = self.sql_data_types_mapping[attr_syntax]