Adding template_params to datasource editor for sqla tables (#6869)

superset/assets/src/datasource/DatasourceEditor.jsx

@@ -448,6 +448,14 @@ export class DatasourceEditor extends React.PureComponent {
           label={t('Hours offset')}
           control={<TextControl />}
         />
+        { this.state.isSqla &&
+          <Field
+            fieldKey="template_params"
+            label={t('Template parameters')}
+            descr={t('A set of parameters that become available in the query using Jinja templating syntax')}
+            control={<TextControl />}
+          />
+        }
       </Fieldset>);
   }
 

superset/connectors/sqla/models.py

@@ -431,6 +431,7 @@ class SqlaTable(Model, BaseDatasource):
             d['time_grain_sqla'] = grains
             d['main_dttm_col'] = self.main_dttm_col
             d['fetch_values_predicate'] = self.fetch_values_predicate
+            d['template_params'] = self.template_params
         return d
 
     def values_for_column(self, column_name, limit=10000):