address comments

Author: gatorsmile

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala

@@ -937,10 +937,10 @@ object SimplifyConditionals extends Rule[LogicalPlan] with PredicateHelper {
  */
 case class OptimizeCodegen(conf: CatalystConf) extends Rule[LogicalPlan] {
   def apply(plan: LogicalPlan): LogicalPlan = plan transformAllExpressions {
-    case e: CaseWhen if canCodeGen(e) => e.toCodegen()
+    case e: CaseWhen if canCodegen(e) => e.toCodegen()
   }
 
-  private def canCodeGen(e: CaseWhen): Boolean = {
+  private def canCodegen(e: CaseWhen): Boolean = {
     val numBranches = e.branches.size + e.elseValue.size
     numBranches <= conf.maxCaseBranchesForCodegen
   }