Rename reverse to reversePartitions

sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlan.scala

@@ -419,23 +419,23 @@ abstract class SparkPlan extends QueryPlan[SparkPlan] with Logging with Serializ
    *
    * This is modeled after `RDD.take` but never runs any job locally on the driver.
    */
-  def executeTake(n: Int): Array[InternalRow] = executeTake(n, reverse = false)
+  def executeTake(n: Int): Array[InternalRow] = executeTake(n, reversePartitions = false)
 
   /**
    * Runs this query returning the last `n` rows as an array.
    *
    * This is modeled after `RDD.take` but never runs any job locally on the driver.
    */
-  def executeTail(n: Int): Array[InternalRow] = executeTake(n, reverse = true)
+  def executeTail(n: Int): Array[InternalRow] = executeTake(n, reversePartitions = true)
 
-  private def executeTake(n: Int, reverse: Boolean): Array[InternalRow] = {
+  private def executeTake(n: Int, reversePartitions: Boolean): Array[InternalRow] = {
     if (n == 0) {
       return new Array[InternalRow](0)
     }
 
-    val childRDD = getByteArrayRdd(n, reverse)
+    val childRDD = getByteArrayRdd(n, reversePartitions)
 
-    val buf = if (reverse) new ListBuffer[InternalRow] else new ArrayBuffer[InternalRow]
+    val buf = if (reversePartitions) new ListBuffer[InternalRow] else new ArrayBuffer[InternalRow]
     val totalParts = childRDD.partitions.length
     var partsScanned = 0
     while (buf.length < n && partsScanned < totalParts) {
@@ -458,7 +458,7 @@ abstract class SparkPlan extends QueryPlan[SparkPlan] with Logging with Serializ
       }
 
       val parts = partsScanned.until(math.min(partsScanned + numPartsToTry, totalParts).toInt)
-      val partsToScan = if (reverse) {
+      val partsToScan = if (reversePartitions) {
         // Reverse partitions to scan. So, if parts was [1, 2, 3] in 200 partitions (0 to 199),
         // it becomes [198, 197, 196].
         parts.map(p => (totalParts - 1) - p)
@@ -471,7 +471,7 @@ abstract class SparkPlan extends QueryPlan[SparkPlan] with Logging with Serializ
 
       var i = 0
 
-      if (reverse) {
+      if (reversePartitions) {
         while (buf.length < n && i < res.length) {
           val rows = decodeUnsafeRows(res(i)._2)
           if (n - buf.length >= res(i)._1) {