i2i样本制作，第2步。

src/main/scala/com/aliyun/odps/spark/examples/makedata_dssm/makedata_i2i_02_joinFeatureData_20241128.scala

@@ -136,7 +136,7 @@ object makedata_i2i_02_joinFeatureData_20241128 {
               val feature_right_cate2 = category2.getOrElse(cate2_right, "{}")
               result.add(
                 (logKey, label, vid_left, vid_right, feature_left, feature_right, feature_left_action, feature_right_action,
-                feature_left_cate1, feature_right_cate1, feature_left_cate2, feature_right_cate2)
+                feature_left_cate1, feature_right_cate1, feature_left_cate2, feature_right_cate2).productIterator.mkString("\t")
               )
           }
           result.iterator