diff --git a/backend/src/main/java/io/dataease/commons/utils/HttpClientUtil.java b/backend/src/main/java/io/dataease/commons/utils/HttpClientUtil.java
index d0faaf8d2a..39a383a0ec 100755
--- a/backend/src/main/java/io/dataease/commons/utils/HttpClientUtil.java
+++ b/backend/src/main/java/io/dataease/commons/utils/HttpClientUtil.java
@@ -123,7 +123,6 @@ public class HttpClientUtil {
             EntityBuilder entityBuilder = EntityBuilder.create();
             entityBuilder.setText(json);
             entityBuilder.setContentType(ContentType.APPLICATION_JSON);
-            entityBuilder.setContentEncoding(config.getCharset());
             HttpEntity requestEntity = entityBuilder.build();
             httpPost.setEntity(requestEntity);
 
diff --git a/backend/src/main/java/io/dataease/service/dataset/DataSetTableService.java b/backend/src/main/java/io/dataease/service/dataset/DataSetTableService.java
index e26dcddc63..006ec809a9 100644
--- a/backend/src/main/java/io/dataease/service/dataset/DataSetTableService.java
+++ b/backend/src/main/java/io/dataease/service/dataset/DataSetTableService.java
@@ -1116,6 +1116,9 @@ public class DataSetTableService {
             if (dsType.equals(DatasourceTypes.oracle.getType())) {
                 subSelect.setAlias(new Alias(fromItem.getAlias().toString(), false));
             } else {
+                if(fromItem.getAlias() == null){
+                    throw new Exception("Failed to parse sql, Every derived table must have its own alias！");
+                }
                 subSelect.setAlias(new Alias(fromItem.getAlias().toString()));
             }
             plainSelect.setFromItem(subSelect);