MaxGekk commented on a change in pull request #32311:
URL: https://github.com/apache/spark/pull/32311#discussion_r619281179



##########
File path: 
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/CollectionExpressionsSuite.scala
##########
@@ -744,8 +745,8 @@ class CollectionExpressionsSuite extends SparkFunSuite with 
ExpressionEvalHelper
 
     checkEvaluation(new Sequence(
       Literal(Timestamp.valueOf("2018-01-01 00:00:00")),
-      Literal(Timestamp.valueOf("2018-01-02 00:00:01")),

Review comment:
       Why did you change the test for `CalendarInterval`? It seems it checks a 
specific case.

##########
File path: 
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/CollectionExpressionsSuite.scala
##########
@@ -760,6 +761,15 @@ class CollectionExpressionsSuite extends SparkFunSuite 
with ExpressionEvalHelper
         Timestamp.valueOf("2018-01-01 12:00:00"),
         Timestamp.valueOf("2018-01-01 00:00:00")))
 
+    checkEvaluation(new Sequence(

Review comment:
       nit: The test is already big enough. Does it make sense to put new 
checks to a separate test and prepend JIRA id?

##########
File path: 
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/CollectionExpressionsSuite.scala
##########
@@ -919,6 +1039,23 @@ class CollectionExpressionsSuite extends SparkFunSuite 
with ExpressionEvalHelper
           Date.valueOf("2020-11-01"),
           Date.valueOf("2022-04-01")))
 
+      checkEvaluation(new Sequence(
+        Literal(Date.valueOf("2018-01-01")),
+        Literal(Date.valueOf("2023-01-01")),
+        Literal(Period.of(1, 5, 0))),
+        Seq(
+          Date.valueOf("2018-01-01"),
+          Date.valueOf("2019-06-01"),
+          Date.valueOf("2020-11-01"),
+          Date.valueOf("2022-04-01")))
+
+      checkExceptionInExpression[IllegalArgumentException](
+        new Sequence(
+          Literal(Date.valueOf("2018-01-01")),
+          Literal(Date.valueOf("2018-01-05")),
+          Literal(Period.ofDays(2))),
+        EmptyRow, "sequence step must be a day interval if start and end 
values are dates")

Review comment:
       `a day interval` -> `a day-time interval`. Please, call 
`DayTimeIntervalType.typeName()` here. Since the types are not stable yet, we 
can rename the types in the near future.




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