hanyuzheng7 commented on code in PR #25759:
URL: https://github.com/apache/flink/pull/25759#discussion_r1876373248


##########
flink-table/flink-table-planner/src/test/java/org/apache/flink/table/planner/functions/TimeFunctionsITCase.java:
##########
@@ -580,10 +585,27 @@ private Stream<TestSetSpec> ceilTestCases() {
                                 $("f2").ceil(TimeIntervalUnit.MILLENNIUM),
                                 "CEIL(f2 TO MILLENNIUM)",
                                 LocalDateTime.of(3001, 1, 1, 0, 0),
-                                TIMESTAMP().nullable()));
+                                TIMESTAMP().nullable())
+                        .testResult(
+                                
$("f2").cast(TIMESTAMP_LTZ(3)).ceil(TimeIntervalUnit.MINUTE),
+                                "CEIL(CAST(f2 AS TIMESTAMP_LTZ(3)) TO MINUTE)",
+                                ZonedDateTime.of(
+                                                LocalDateTime.of(2020, 2, 29, 
1, 57, 0),
+                                                ZoneId.of("UTC"))
+                                        .toInstant(),
+                                TIMESTAMP_LTZ(3))
+                        .testResult(
+                                
$("f3").cast(TIMESTAMP_LTZ(3)).ceil(TimeIntervalUnit.SECOND),
+                                "CEIL(CAST(f3 AS TIMESTAMP_LTZ(3)) TO SECOND)",
+                                ZonedDateTime.of(
+                                                LocalDateTime.of(2020, 2, 29, 
1, 56, 58),
+                                                ZoneId.of("UTC"))
+                                        .toInstant(),
+                                TIMESTAMP_LTZ(3)));
     }
 
     private Stream<TestSetSpec> floorTestCases() {
+        TimeZone.setDefault(TimeZone.getTimeZone("UTC"));

Review Comment:
   Can we do that in floor and ceil test?
   I think I can extract these test and generate an new stream TestCases.



##########
flink-table/flink-table-planner/src/test/java/org/apache/flink/table/planner/functions/TimeFunctionsITCase.java:
##########
@@ -580,10 +585,27 @@ private Stream<TestSetSpec> ceilTestCases() {
                                 $("f2").ceil(TimeIntervalUnit.MILLENNIUM),
                                 "CEIL(f2 TO MILLENNIUM)",
                                 LocalDateTime.of(3001, 1, 1, 0, 0),
-                                TIMESTAMP().nullable()));
+                                TIMESTAMP().nullable())
+                        .testResult(
+                                
$("f2").cast(TIMESTAMP_LTZ(3)).ceil(TimeIntervalUnit.MINUTE),
+                                "CEIL(CAST(f2 AS TIMESTAMP_LTZ(3)) TO MINUTE)",
+                                ZonedDateTime.of(
+                                                LocalDateTime.of(2020, 2, 29, 
1, 57, 0),
+                                                ZoneId.of("UTC"))
+                                        .toInstant(),
+                                TIMESTAMP_LTZ(3))
+                        .testResult(
+                                
$("f3").cast(TIMESTAMP_LTZ(3)).ceil(TimeIntervalUnit.SECOND),
+                                "CEIL(CAST(f3 AS TIMESTAMP_LTZ(3)) TO SECOND)",
+                                ZonedDateTime.of(
+                                                LocalDateTime.of(2020, 2, 29, 
1, 56, 58),
+                                                ZoneId.of("UTC"))
+                                        .toInstant(),
+                                TIMESTAMP_LTZ(3)));
     }
 
     private Stream<TestSetSpec> floorTestCases() {
+        TimeZone.setDefault(TimeZone.getTimeZone("UTC"));

Review Comment:
   Can we do that in floor and ceil test?
   I think I can extract these tests and generate an new stream TestCases.



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