PHILO-HE commented on code in PR #8583:
URL: https://github.com/apache/incubator-gluten/pull/8583#discussion_r1924782665


##########
gluten-ut/spark35/src/test/scala/org/apache/spark/sql/GlutenDateFunctionsSuite.scala:
##########
@@ -29,6 +29,34 @@ class GlutenDateFunctionsSuite extends DateFunctionsSuite 
with GlutenSQLTestsTra
 
   private def secs(millis: Long): Long = 
TimeUnit.MILLISECONDS.toSeconds(millis)
 
+  test("unix_timestamp/to_unix_timestamp") {

Review Comment:
   Seems there is no need to add a new test. We can just remove the below 
commented code to allow test legacy policy.
   
   
https://github.com/apache/incubator-gluten/blob/main/gluten-ut/spark35/src/test/scala/org/apache/spark/sql/GlutenDateFunctionsSuite.scala#L118
   
   
https://github.com/apache/incubator-gluten/blob/main/gluten-ut/spark35/src/test/scala/org/apache/spark/sql/GlutenDateFunctionsSuite.scala#L237
   
   Ditto for spark32/33/34.



##########
cpp/velox/compute/WholeStageResultIterator.cc:
##########
@@ -551,8 +551,13 @@ std::unordered_map<std::string, std::string> 
WholeStageResultIterator::getQueryC
 
     configs[velox::core::QueryConfig::kSparkPartitionId] = 
std::to_string(taskInfo_.partitionId);
 
-    // Enable Spark legacy date formatter if spark.sql.legacy.timeParserPolicy 
is set to 'LEGACY'.
-    if (veloxCfg_->get<std::string>(kSparkLegacyTimeParserPolicy, "") == 
"LEGACY") {
+    // Enable Spark legacy date formatter if spark.sql.legacy.timeParserPolicy 
is set to 'LEGACY'
+    // or 'legacy'.
+    auto sparkPolicy = 
veloxCfg_->get<std::string>(kSparkLegacyTimeParserPolicy, "");
+    for (auto& c : sparkPolicy) {
+      c = std::toupper(static_cast<unsigned char>(c));
+    }
+    if (sparkPolicy == "LEGACY") {

Review Comment:
   Seems we can just do this check: `if (sparkPolicy == "LEGACY" || sparkPolicy 
 == "legacy")`. No need to convert to lower case.



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