null和''的判断

server/src/main/java/edp/davinci/service/impl/QualityTaskServiceImpl.java

@@ -174,7 +174,7 @@ public class QualityTaskServiceImpl implements QualityTaskService {
             if (dataRules.getRuleType().equalsIgnoreCase("null_data")) {
                 // 日期格式
                 sql.append(" and ");
-                sql.append(fieldName + " is null ");
+                sql.append(fieldName + " is '' ");
             }
             // 符合条件的
             List<Map<String, Object>> newResult = sqlUtils.query4List(sql.toString(), -1);