diff --git a/fe/fe-core/src/main/java/org/apache/doris/tablefunction/ExternalFileTableValuedFunction.java b/fe/fe-core/src/main/java/org/apache/doris/tablefunction/ExternalFileTableValuedFunction.java
index cb1a2d89c5..f16f93f013 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/tablefunction/ExternalFileTableValuedFunction.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/tablefunction/ExternalFileTableValuedFunction.java
@@ -351,6 +351,7 @@ public abstract class ExternalFileTableValuedFunction extends TableValuedFunctio
             for (int i = 0; i < tableColumns.size(); i++) {
                 Column column = new Column(tableColumns.get(i).getName(), tableColumns.get(i).getType(), true);
                 column.setUniqueId(tableColumns.get(i).getUniqueId());
+                column.setIsAllowNull(true);
                 fileColumns.add(column);
             }
             return fileColumns;