chore: Update tests

Author: Weijun-H

datafusion/core/tests/expr_api/simplification.rs

@@ -514,7 +514,7 @@ fn multiple_now() -> Result<()> {
     // expect the same timestamp appears in both exprs
     let actual = get_optimized_plan_formatted(plan, &time);
     let expected = format!(
-        "Projection: TimestampNanosecond({}, Some(\"+00\")) AS now(), TimestampNanosecond({}, Some(\"+00\")) AS t2\n  TableScan: test",
+        "Projection: TimestampNanosecond({}, Some(\"+00:00\")) AS now(), TimestampNanosecond({}, Some(\"+00:00\")) AS t2\n  TableScan: test",
         time.timestamp_nanos_opt().unwrap(),
         time.timestamp_nanos_opt().unwrap()
     );

datafusion/sqllogictest/test_files/arrow_typeof.slt

@@ -67,7 +67,7 @@ Timestamp(Nanosecond, None)
 query T
 SELECT arrow_typeof(now())
 ----
-Timestamp(Nanosecond, Some("+00"))
+Timestamp(Nanosecond, Some("+00:00"))
 
 # arrow_typeof_timestamp_date32(
 query T

datafusion/sqllogictest/test_files/timestamps.slt

@@ -81,6 +81,11 @@ select arrow_typeof(now());
 ----
 Timestamp(Nanosecond, Some("+08"))
 
+query I
+SELECT count(1) result FROM (SELECT now() as n) a WHERE n > '2000-01-01'::date;
+----
+1
+
 statement ok
 SET TIME ZONE = '+00'