1) execute a data index query with a where condition that includes a DateTime vale. { UserTaskInstances(where: {started: {greaterThan: "3000-11-18T11:43:00.456Z"}}) { id started } } 2) the query returns all tasks, but see that the year is 3000, so not tasks should have been returned. In general I've noted the same happens with other DataTime fields, and in other queries like the ProcessInstances too. After doing a quick debug I've could see that when the query is being executed the DataFetchinigEnvironment has no value for greaterThan parameter and the GraphQLScalarTypeProducer wasn't invoked during the query execution. Maybe the scalar type DateTime is not being completely registered.