Fix ORDER BY NULL

JoshRosen · JoshRosen · commit f9efbb5f317d · 2015-07-01T23:17:28.000-07:00
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
@@ -185,6 +185,7 @@ class CodeGenContext {
     // use c1 - c2 may overflow
     case dt: DataType if isPrimitiveType(dt) => s"($c1 > $c2 ? 1 : $c1 < $c2 ? -1 : 0)"
     case BinaryType => s"org.apache.spark.sql.catalyst.util.TypeUtils.compareBinary($c1, $c2)"
+    case NullType => "0"
     case other => s"$c1.compare($c2)"
   }
 

Original file line number	Diff line number	Diff line change
`@@ -185,6 +185,7 @@ class CodeGenContext {`
`185`	`185`	`// use c1 - c2 may overflow`
`186`	`186`	`case dt: DataType if isPrimitiveType(dt) => s"($c1 > $c2 ? 1 : $c1 < $c2 ? -1 : 0)"`
`187`	`187`	`case BinaryType => s"org.apache.spark.sql.catalyst.util.TypeUtils.compareBinary($c1, $c2)"`
	`188`	`+ case NullType => "0"`
`188`	`189`	`case other => s"$c1.compare($c2)"`
`189`	`190`	`}`
`190`	`191`