[GitHub] [superset] zhaoyongjie commented on a change in pull request #15975: fix: eliminate cartesian product columns in pivot operator

[GitBox <gi...@apache.org>]

zhaoyongjie commented on a change in pull request #15975:
URL: https://github.com/apache/superset/pull/15975#discussion_r679878804



##########
File path: tests/integration_tests/pandas_postprocessing_tests.py
##########
@@ -256,6 +257,29 @@ def test_pivot_exceptions(self):
             aggregates={"idx_nulls": {}},
         )
 
+    def test_pivot_eliminate_cartesian_product_columns(self):
+        mock_df = DataFrame(
+            {
+                "dttm": to_datetime(["2019-01-01", "2019-01-01"]),
+                "a": [0, 1],
+                "b": [0, 1],
+                "metric": [9, np.NAN],
+            }
+        )
+
+        df = proc.pivot(
+            df=mock_df,
+            index=["dttm"],
+            columns=["a", "b"],
+            aggregates={"metric": {"operator": "mean"}},
+            drop_missing_columns=False,
+        )
+        print(df)

Review comment:
       LOL.....




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