[SPARK-31980][SQL] Function sequence() fails if start and end of rang…

…e are equal dates

### What changes were proposed in this pull request?
1. Add judge equal as bigger condition in `org.apache.spark.sql.catalyst.expressions.Sequence.TemporalSequenceImpl#eval`
2. Unit test for interval `day`, `month`, `year`

### Why are the changes needed?
Bug exists when sequence input get same equal start and end dates, which will occur `while loop` forever

### Does this PR introduce _any_ user-facing change?
Yes,
Before this PR, people will get a `java.lang.ArrayIndexOutOfBoundsException`, when eval as below:
`sql("select sequence(cast('2011-03-01' as date), cast('2011-03-01' as date), interval 1 year)").show(false)
`

### How was this patch tested?
Unit test.

Closes #28819 from TJX2014/master-SPARK-31980.

Authored-by: TJX2014 <xiaoxingstack@gmail.com>
Signed-off-by: Dongjoon Hyun <dongjoon@apache.org>

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala

@@ -2628,7 +2628,7 @@ object Sequence {
         val maxEstimatedArrayLength =
           getSequenceLength(startMicros, stopMicros, intervalStepInMicros)
 
-        val stepSign = if (stopMicros > startMicros) +1 else -1
+        val stepSign = if (stopMicros >= startMicros) +1 else -1
         val exclusiveItem = stopMicros + stepSign
         val arr = new Array[T](maxEstimatedArrayLength)
         var t = startMicros
@@ -2690,7 +2690,7 @@ object Sequence {
          |
          |  $sequenceLengthCode
          |
-         |  final int $stepSign = $stopMicros > $startMicros ? +1 : -1;
+         |  final int $stepSign = $stopMicros >= $startMicros ? +1 : -1;
          |  final long $exclusiveItem = $stopMicros + $stepSign;
          |
          |  $arr = new $elemType[$arrLength];

sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/CollectionExpressionsSuite.scala

@@ -1836,4 +1836,22 @@ class CollectionExpressionsSuite extends SparkFunSuite with ExpressionEvalHelper
     checkEvaluation(ArrayIntersect(empty, oneNull), Seq.empty)
     checkEvaluation(ArrayIntersect(oneNull, empty), Seq.empty)
   }
+
+  test("SPARK-31980: Start and end equal in month range") {
+    checkEvaluation(new Sequence(
+      Literal(Date.valueOf("2018-01-01")),
+      Literal(Date.valueOf("2018-01-01")),
+      Literal(stringToInterval("interval 1 day"))),
+      Seq(Date.valueOf("2018-01-01")))
+    checkEvaluation(new Sequence(
+      Literal(Date.valueOf("2018-01-01")),
+      Literal(Date.valueOf("2018-01-01")),
+      Literal(stringToInterval("interval 1 month"))),
+      Seq(Date.valueOf("2018-01-01")))
+    checkEvaluation(new Sequence(
+      Literal(Date.valueOf("2018-01-01")),
+      Literal(Date.valueOf("2018-01-01")),
+      Literal(stringToInterval("interval 1 year"))),
+      Seq(Date.valueOf("2018-01-01")))
+  }
 }