chore: Migrate arctan2_op operator to SQLGlot

Migrated the arctan2_op operator to SQLGlot.

Author: jialuoo

bigframes/core/compile/sqlglot/expressions/numeric_ops.py

@@ -77,6 +77,11 @@ def _(expr: TypedExpr) -> sge.Expression:
     return sge.func("ASINH", expr.expr)
 
 
+@register_binary_op(ops.arctan2_op)
+def _(left: TypedExpr, right: TypedExpr) -> sge.Expression:
+    return sge.func("ATAN2", left.expr, right.expr)
+
+
 @register_unary_op(ops.arctan_op)
 def _(expr: TypedExpr) -> sge.Expression:
     return sge.func("ATAN", expr.expr)

tests/unit/core/compile/sqlglot/expressions/snapshots/test_numeric_ops/test_arctan2/out.sql

@@ -0,0 +1,14 @@
+WITH `bfcte_0` AS (
+  SELECT
+    `int64_col` AS `bfcol_0`,
+    `float64_col` AS `bfcol_1`
+  FROM `bigframes-dev`.`sqlglot_test`.`scalar_types`
+), `bfcte_1` AS (
+  SELECT
+    *,
+    ATAN2(`bfcol_0`, `bfcol_1`) AS `bfcol_2`
+  FROM `bfcte_0`
+)
+SELECT
+  `bfcol_2` AS `int64_col`
+FROM `bfcte_1`

tests/unit/core/compile/sqlglot/expressions/test_numeric_ops.py

@@ -55,6 +55,13 @@ def test_arcsinh(scalar_types_df: bpd.DataFrame, snapshot):
     snapshot.assert_match(sql, "out.sql")
 
 
+def test_arctan2(scalar_types_df: bpd.DataFrame, snapshot):
+    bf_df = scalar_types_df[["int64_col", "float64_col"]]
+    sql = utils._apply_binary_op(bf_df, ops.arctan2_op, "int64_col", "float64_col")
+
+    snapshot.assert_match(sql, "out.sql")
+
+
 def test_arctan(scalar_types_df: bpd.DataFrame, snapshot):
     col_name = "float64_col"
     bf_df = scalar_types_df[[col_name]]