Fix the behavior of "/" and add "DIV"
-------------------------------------
Key: HIVE-774
URL: https://issues.apache.org/jira/browse/HIVE-774
Project: Hadoop Hive
Issue Type: Bug
Affects Versions: 0.4.0, 0.5.0
Reporter: Zheng Shao
In hive, "select 3/2" will return 1 while MySQL returns 1.5.
See
http://dev.mysql.com/doc/refman/5.0/en/arithmetic-functions.html#operator_div
for details.
{code}
mysql> select 3/2;
+--------+
| 3/2 |
+--------+
| 1.5000 |
+--------+
1 row in set (0.00 sec)
mysql> select 3 div 2;
+---------+
| 3 div 2 |
+---------+
| 1 |
+---------+
1 row in set (0.00 sec)
mysql> select -3 div 2;
+----------+
| -3 div 2 |
+----------+
| -1 |
+----------+
1 row in set (0.00 sec)
mysql> select -3 div -2;
+-----------+
| -3 div -2 |
+-----------+
| 1 |
+-----------+
1 row in set (0.00 sec)
mysql> select 3 div -2;
+----------+
| 3 div -2 |
+----------+
| -1 |
+----------+
1 row in set (0.00 sec)
{code}
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