From d5fc51491808630d0328a5937dbf349e00de361f Mon Sep 17 00:00:00 2001
From: Daoyuan Wang <daoyuan.wang@intel.com>
Date: Thu, 12 Feb 2015 15:22:07 -0800
Subject: [PATCH] [SPARK-5755] [SQL] remove unnecessary Add
explain extended select +key from src;
before:
== Parsed Logical Plan ==
'Project [(0 + 'key) AS _c0#8]
'UnresolvedRelation [src], None
== Analyzed Logical Plan ==
Project [(0 + key#10) AS _c0#8]
MetastoreRelation test, src, None
== Optimized Logical Plan ==
Project [(0 + key#10) AS _c0#8]
MetastoreRelation test, src, None
== Physical Plan ==
Project [(0 + key#10) AS _c0#8]
HiveTableScan [key#10], (MetastoreRelation test, src, None), None
after this patch:
== Parsed Logical Plan ==
'Project ['key]
'UnresolvedRelation [src], None
== Analyzed Logical Plan ==
Project [key#10]
MetastoreRelation test, src, None
== Optimized Logical Plan ==
Project [key#10]
MetastoreRelation test, src, None
== Physical Plan ==
HiveTableScan [key#10], (MetastoreRelation test, src, None), None
Author: Daoyuan Wang <daoyuan.wang@intel.com>
Closes #4551 from adrian-wang/positive and squashes the following commits:
0821ae4 [Daoyuan Wang] remove unnecessary Add
---
sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
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
index f3c9e63652..5269460e5b 100644
--- 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
@@ -1099,7 +1099,7 @@ https://cwiki.apache.org/confluence/display/Hive/Enhanced+Aggregation%2C+Cube%2C
Cast(nodeToExpr(arg), DateType)
/* Arithmetic */
- case Token("+", child :: Nil) => Add(Literal(0), nodeToExpr(child))
+ case Token("+", child :: Nil) => 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))
--
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