Modify the literal value of the result of transformation from Sum to long value.

Author: ueshin

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

@@ -101,7 +101,7 @@ object NullPropagation extends Rule[LogicalPlan] {
   def apply(plan: LogicalPlan): LogicalPlan = plan transform {
     case q: LogicalPlan => q transformExpressionsUp {
       case e @ Count(Literal(null, _)) => Cast(Literal(0L), e.dataType)
-      case e @ Sum(Literal(c, _)) if c == 0 => Cast(Literal(0), e.dataType)
+      case e @ Sum(Literal(c, _)) if c == 0 => Cast(Literal(0L), e.dataType)
       case e @ Average(Literal(c, _)) if c == 0 => Literal(0.0, e.dataType)
       case e @ IsNull(c) if c.nullable == false => Literal(false, BooleanType)
       case e @ IsNotNull(c) if c.nullable == false => Literal(true, BooleanType)