[HIVE-17077] Hive should raise StringIndexOutOfBoundsException when LPAD/RPAD len character's value is negative number

• Type: Bug
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Labels: pull-request-available
• Assignee: Lingang Deng
• Reporter: Lingang Deng
• Created: 12/Jul/17 07:55
• Updated: 24/Jun/20 00:26

Description

lpad(rpad) throw a exception when the second argument a negative number, as follows,

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

Maybe we should return friendly result such as mysql.

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)

Issue Links

• links to: GitHub Pull Request #203
• links to: GitHub Pull Request #203