Merge remote-tracking branch 'github/main' into orderingmode3

bigframes/core/compile/single_column.py

@@ -154,6 +154,7 @@ def join_by_column_unordered(
         "left",
         "outer",
         "right",
+        "cross",
     ],
     allow_row_identity_join: bool = True,
 ) -> compiled.UnorderedIR:

tests/system/small/test_dataframe.py

@@ -1839,11 +1839,17 @@ def test_join_param_on(scalars_dfs, how):
     bf_df_a = bf_df_a.assign(rowindex_2=bf_df_a["rowindex_2"] + 2)
     bf_df_b = bf_df[["float64_col"]]
 
-    pd_df_a = pd_df[["string_col", "int64_col", "rowindex_2"]]
-    pd_df_a = pd_df_a.assign(rowindex_2=pd_df_a["rowindex_2"] + 2)
-    pd_df_b = pd_df[["float64_col"]]
-    pd_result = pd_df_a.join(pd_df_b, on="rowindex_2", how=how)
-    assert_pandas_df_equal(bf_result, pd_result, ignore_order=True)
+    if how == "cross":
+        with pytest.raises(ValueError):
+            bf_df_a.join(bf_df_b, on="rowindex_2", how=how)
+    else:
+        bf_result = bf_df_a.join(bf_df_b, on="rowindex_2", how=how).to_pandas()
+
+        pd_df_a = pd_df[["string_col", "int64_col", "rowindex_2"]]
+        pd_df_a = pd_df_a.assign(rowindex_2=pd_df_a["rowindex_2"] + 2)
+        pd_df_b = pd_df[["float64_col"]]
+        pd_result = pd_df_a.join(pd_df_b, on="rowindex_2", how=how)
+        assert_pandas_df_equal(bf_result, pd_result, ignore_order=True)
 
 
 @pytest.mark.parametrize(