diff --git a/headless/server/src/main/java/com/tencent/supersonic/headless/server/utils/QueryUtils.java b/headless/server/src/main/java/com/tencent/supersonic/headless/server/utils/QueryUtils.java
index 75f3ca44f..e6b89a7fd 100644
--- a/headless/server/src/main/java/com/tencent/supersonic/headless/server/utils/QueryUtils.java
+++ b/headless/server/src/main/java/com/tencent/supersonic/headless/server/utils/QueryUtils.java
@@ -109,7 +109,7 @@ public class QueryUtils {
                     column.setModelId(metric.getModelId());
                 }
                 // if column nameEn contains metric alias, use metric dataFormatType
-                if (column.getDataFormatType() == null && metric.getAlias() != null) {
+                if (column.getDataFormatType() == null && StringUtils.isNotEmpty(metric.getAlias())) {
                     for (String alias : metric.getAlias().split(",")) {
                         if (nameEn.contains(alias)) {
                             column.setDataFormatType(metric.getDataFormatType());