snapshot update

Author: shuoweil

bigframes/dataframe.py

@@ -2288,8 +2288,13 @@ def _assign_scalar(self, label: str, value: Union[int, float, str]) -> DataFrame
     def _assign_series_join_on_index(
         self, label: str, series: bigframes.series.Series
     ) -> DataFrame:
+        # Only use block_identity_join for null indices
+        use_block_identity_join = (
+            self._block.index.nlevels == 0 and series._block.index.nlevels == 0
+        )
+
         block, (get_column_left, get_column_right) = self._block.join(
-            series._block, how="left", block_identity_join=True
+            series._block, how="left", block_identity_join=use_block_identity_join
         )
 
         column_ids = [

tests/unit/core/compile/sqlglot/expressions/snapshots/test_binary_compiler/test_add_numeric/out.sql

@@ -1,16 +1,42 @@
-WITH `bfcte_0` AS (
+WITH `bfcte_1` AS (
   SELECT
-    `int64_col` AS `bfcol_0`,
-    `rowindex` AS `bfcol_1`
+    `rowindex` AS `bfcol_0`
   FROM `bigframes-dev`.`sqlglot_test`.`scalar_types`
-), `bfcte_1` AS (
+), `bfcte_4` AS (
+  SELECT
+    `bfcol_0` AS `bfcol_1`
+  FROM `bfcte_1`
+), `bfcte_0` AS (
+  SELECT
+    `int64_col` AS `bfcol_2`,
+    `rowindex` AS `bfcol_3`
+  FROM `bigframes-dev`.`sqlglot_test`.`scalar_types`
+), `bfcte_2` AS (
   SELECT
     *,
-    `bfcol_1` AS `bfcol_4`,
-    `bfcol_0` + `bfcol_0` AS `bfcol_5`
+    `bfcol_3` AS `bfcol_6`,
+    `bfcol_2` AS `bfcol_7`,
+    `bfcol_2` AS `bfcol_8`
   FROM `bfcte_0`
+), `bfcte_3` AS (
+  SELECT
+    *,
+    `bfcol_7` + `bfcol_8` AS `bfcol_12`
+  FROM `bfcte_2`
+), `bfcte_5` AS (
+  SELECT
+    `bfcol_6` AS `bfcol_13`,
+    `bfcol_12` AS `bfcol_14`
+  FROM `bfcte_3`
+), `bfcte_6` AS (
+  SELECT
+    *
+  FROM `bfcte_4`
+  LEFT JOIN `bfcte_5`
+    ON COALESCE(`bfcol_1`, 0) = COALESCE(`bfcol_13`, 0)
+    AND COALESCE(`bfcol_1`, 1) = COALESCE(`bfcol_13`, 1)
 )
 SELECT
-  `bfcol_4` AS `rowindex`,
-  `bfcol_5` AS `int64_col`
-FROM `bfcte_1`
+  `bfcol_1` AS `rowindex`,
+  `bfcol_14` AS `int64_col`
+FROM `bfcte_6`