sql-case22

apache · Feb 4, 2015 · c5cd5bc · c5cd5bc
1 parent e380d2d
commit c5cd5bc
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diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/arithmetic.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/arithmetic.scala
@@ -20,6 +20,19 @@ package org.apache.spark.sql.catalyst.expressions
 import org.apache.spark.sql.catalyst.analysis.UnresolvedException
 import org.apache.spark.sql.types._
 
+case class UnaryPlus(child: Expression) extends UnaryExpression {
+  type EvaluatedType = Any
+
+  def dataType = child.dataType
+  override def foldable = child.foldable
+  def nullable = child.nullable
+  override def toString = s"+$child"
+
+  override def eval(input: Row): Any = {
+    n1(child, input, _)
+  }
+}
+
 case class UnaryMinus(child: Expression) extends UnaryExpression {
   type EvaluatedType = Any
 

diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala
@@ -1101,6 +1101,7 @@ https://cwiki.apache.org/confluence/display/Hive/Enhanced+Aggregation%2C+Cube%2C
       Cast(nodeToExpr(arg), DateType)
 
     /* Arithmetic */
+    case Token("+", child :: Nil) => UnaryPlus(nodeToExpr(child))
     case Token("-", child :: Nil) => UnaryMinus(nodeToExpr(child))
     case Token("~", child :: Nil) => BitwiseNot(nodeToExpr(child))
     case Token("+", left :: right:: Nil) => Add(nodeToExpr(left), nodeToExpr(right))