Lingang Deng created HIVE-17077:
-----------------------------------
Summary: lpad(rpad) should return a value but not throw a exception
Key: HIVE-17077
URL: https://issues.apache.org/jira/browse/HIVE-17077
Project: Hive
Issue Type: Bug
Reporter: Lingang Deng
Assignee: Lingang Deng
Priority: Minor
lpad(rpad) throw a exception when the second argument a negative number, as
follows,
{code:java}
hive> select lpad("hello", -1 ,"h");
FAILED: StringIndexOutOfBoundsException String index out of range: -1
hive> select rpad("hello", -1 ,"h");
FAILED: StringIndexOutOfBoundsException String index out of range: -1
{code}
Maybe we should return friendly result such as mysql.
{code:java}
mysql> select lpad("hello", -1 ,"h");
+----------------------+
| lpad("hello", -1 ,"h") |
+----------------------+
| NULL |
+----------------------+
1 row in set (0.00 sec)
mysql> select rpad("hello", -1 ,"h");
+----------------------+
| rpad("hello", -1 ,"h") |
+----------------------+
| NULL |
+----------------------+
1 row in set (0.00 sec)
{code}
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