diff --git a/superset/connectors/sqla/models.py b/superset/connectors/sqla/models.py
index 73f45c4a4..fa53e313a 100644
--- a/superset/connectors/sqla/models.py
+++ b/superset/connectors/sqla/models.py
@@ -861,13 +861,13 @@ class SqlaTable(Model, BaseDatasource):
             dbcol = dbcols.get(col.name, None)
             if not dbcol:
                 dbcol = TableColumn(column_name=col.name, type=datatype)
-                dbcol.groupby = dbcol.is_string
-                dbcol.filterable = dbcol.is_string
                 dbcol.sum = dbcol.is_num
                 dbcol.avg = dbcol.is_num
                 dbcol.is_dttm = dbcol.is_time
             else:
                 dbcol.type = datatype
+            dbcol.groupby = True
+            dbcol.filterable = True
             self.columns.append(dbcol)
             if not any_date_col and dbcol.is_time:
                 any_date_col = col.name