test: add tests for timezone changes

datafusion/sqllogictest/test_files/timestamps.slt

@@ -3063,3 +3063,41 @@ SELECT column1 FROM t_utc WHERE column1 IN ('2024-01-31T16:00:01' AT TIME ZONE '
 ----
 2024-02-01T00:00:01Z
 
+query P
+SELECT column1 as u from t_utc UNION SELECT column1 from t_europe ORDER BY u;
+----
+2023-12-31T23:00:01Z
+2024-01-01T00:00:01Z
+2024-01-31T23:00:01Z
+2024-02-01T00:00:01Z
+2024-02-29T23:00:01Z
+2024-03-01T00:00:01Z
+
+query P
+SELECT column1 as e from t_europe UNION SELECT column1 from t_utc ORDER BY e;
+----
+2024-01-01T00:00:01+01:00
+2024-01-01T01:00:01+01:00
+2024-02-01T00:00:01+01:00
+2024-02-01T01:00:01+01:00
+2024-03-01T00:00:01+01:00
+2024-03-01T01:00:01+01:00
+
+query P
+SELECT nvl2(null, '2020-01-01T00:00:00-04:00'::timestamp, '2021-02-03T04:05:06Z'::timestamp)
+----
+2021-02-03T04:05:06
+
+query ?
+SELECT make_array('2020-01-01T00:00:00-04:00'::timestamp, '2021-01-01T01:02:03Z'::timestamp);
+----
+[2020-01-01T04:00:00, 2021-01-01T01:02:03]
+
+statement ok
+drop table t;
+
+statement ok
+drop view t_utc;
+
+statement ok
+drop view t_europe;