为空判断

onemap-modules/onemap-analyse/src/main/java/com/onemap/analyse/service/impl/CreateUtilsDBServiceImpl.java

@@ -44,6 +44,9 @@ public class CreateUtilsDBServiceImpl implements CreateUtilsDBService {
 
     @Override
     public String differenceTableWkt(String tableName, List<String> tableIds, String ewkt) {
+       if(ewkt.equals("")){
+           return tableName;
+       }
         long timestamp = System.currentTimeMillis();
         String[] tableNames = Strings.split(tableName, '_');