import * as connTypes from '../actions/connections';
import * as tablesTypes from '../actions/tables';
import * as queriesTypes from '../actions/queries';


const INITIAL_STATE = '';


export default function (state = INITIAL_STATE, action) {
  switch (action.type) {
  case connTypes.CONNECTION_REQUEST:
    return 'Connecting to server...';
  case connTypes.CONNECTION_SUCCESS:
    return 'Connection to server established';
  case tablesTypes.FETCH_TABLES_REQUEST:
    return 'Loading list of tables...';
  case queriesTypes.EXECUTE_QUERY_REQUEST:
    return 'Executing query...';
  default :
    return '';
  }
}

@@ -586,17 +586,16 @@
  default
- 
 :%0A    re
@@ -599,18 +599,29 @@
  return 
-''
+INITIAL_STATE
 ;%0A  %7D%0A%7D%0A

Use initial state variable is a status default action