fix(bigquery): support microseconds in time literals (#9610)

Closes #9609.

ibis/backends/bigquery/tests/unit/snapshots/test_compiler/test_time_from_hms_with_micros/micros.sql

@@ -0,0 +1,2 @@
+SELECT
+  TIME_ADD(TIME(12, 34, 56), INTERVAL 789101 MICROSECOND) AS `datetime_time_12_34_56_789101`

ibis/backends/bigquery/tests/unit/snapshots/test_compiler/test_time_from_hms_with_micros/no_micros.sql

@@ -0,0 +1,2 @@
+SELECT
+  TIME(12, 34, 56) AS `datetime_time_12_34_56`

ibis/backends/bigquery/tests/unit/test_compiler.py

@@ -667,3 +667,13 @@ def test_subquery_scalar_params(snapshot):
     )
     result = ibis.to_sql(expr, params={p: "20140101"}, dialect="bigquery")
     snapshot.assert_match(result, "out.sql")
+
+
+def test_time_from_hms_with_micros(snapshot):
+    literal = ibis.literal(datetime.time(12, 34, 56, 789101))
+    result = ibis.to_sql(literal, dialect="bigquery")
+    snapshot.assert_match(result, "micros.sql")
+
+    literal = ibis.literal(datetime.time(12, 34, 56))
+    result = ibis.to_sql(literal, dialect="bigquery")
+    snapshot.assert_match(result, "no_micros.sql")

ibis/backends/sql/compilers/bigquery.py

@@ -283,7 +283,15 @@ def visit_NonNullLiteral(self, op, *, value, dtype):
         elif dtype.is_date():
             return self.f.date_from_parts(value.year, value.month, value.day)
         elif dtype.is_time():
-            return self.f.time_from_parts(value.hour, value.minute, value.second)
+            time = self.f.time_from_parts(value.hour, value.minute, value.second)
+            if micros := value.microsecond:
+                # bigquery doesn't support `time(12, 34, 56.789101)`, AKA a
+                # float seconds specifier, so add any non-zero micros to the
+                # time value
+                return sge.TimeAdd(
+                    this=time, expression=sge.convert(micros), unit=self.v.MICROSECOND
+                )
+            return time
         elif dtype.is_binary():
             return sge.Cast(
                 this=sge.convert(value.hex()),