KevinyhZou commented on code in PR #10248:
URL: 
https://github.com/apache/incubator-gluten/pull/10248#discussion_r2241964859


##########
gluten-flink/ut/src/test/java/org/apache/gluten/table/runtime/stream/custom/ScalarFunctionsTest.java:
##########
@@ -169,4 +172,28 @@ void testDecimal() {
     query = "select b + e as x from tblDecimal where a > 0";
     runAndCheck(query, Arrays.asList("+I[2.0]", "+I[5.0]", "+I[7.0]"));
   }
+
+  @Test
+  void testDateFormat() {
+    List<Row> rows =
+        Arrays.asList(Row.of(1, "2024-12-31 12:12:12"), Row.of(2, "2025-02-28 
12:12:12"));
+    createSimpleBoundedValuesTable("dateFormatTbl", "a int, b string", rows);
+    String query =
+        "select a, DATE_FORMAT(cast(b as Timestamp(3)), 'yyyy-MM-dd'), 
DATE_FORMAT(cast(b as Timestamp(3)), 'yyyy-MM-dd HH:mm:ss') from dateFormatTbl";
+    runAndCheck(
+        query,
+        Arrays.asList(
+            "+I[1, 2024-12-31, 2024-12-31 12:12:12]", "+I[2, 2025-02-28, 
2025-02-28 12:12:12]"));
+    Map<String, String> configs =
+        Map.of(
+            VeloxQueryConfig.ADJUST_TIMESTMP_TO_SESSION_TIMEZONE.key(),
+            "true",
+            TableConfigOptions.LOCAL_TIME_ZONE.key(),
+            "America/Los_Angeles");

Review Comment:
   The flink `create view` is `logical view`, data is materialized, so you 
described above it is the same as `select ... date_format(cast(xxx as 
timestamp), 'yyyy-MM-dd HH:mm:ss')`, and this is different from spark.



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