public RelDataType getRowType(RelDataTypeFactory typeFactory) of subclass of AbstractTable does not called

[xiaobo]

Hi,

we are trying to make a dynamic reflective schema at github: 
https://github.com/guxiaobo/calcite-json-adapter

we found our getRowType method has not been called when creating our JsonSchema 
nor executing SQL, can you help checking what's missing.

below is the main test code:

                Map<String, List<JSONObject>> map = new HashMap<String, 
List<JSONObject>>();
                List<JSONObject> t1 = new ArrayList<JSONObject>();
                JSONObject r1 = new JSONObject();
                t1.add(r1);
                map.put("t1", t1);
                
                r1.put("c1", Long.valueOf(100));
                r1.put("c2", "column2");
                r1.put("c3", Boolean.FALSE);
                r1.put("c4", new BigDecimal("2.1"));
                r1.put("c5", new java.sql.Date(2022, 2, 22));
                r1.put("c6", new java.sql.Time(System.currentTimeMillis()));
                r1.put("c7", new 
java.sql.Timestamp(System.currentTimeMillis()));
                
                String sql1 = "select count(*) from t1";
                String sql2 = "select count(*) from js.t1";
                

                Schema schema = new JsonSchema(map);