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From "Sergey Shelukhin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-17077) Hive should raise StringIndexOutOfBoundsException when LPAD/RPAD len character's value is negative number
Date Mon, 24 Jul 2017 19:17:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-17077?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16099006#comment-16099006
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Sergey Shelukhin commented on HIVE-17077:
-----------------------------------------

cc [~ashutoshc] what's the default behavior in Hive for these things? I think throwing a better
exception (invalid argument) would be better. But we do return null for some invalid type
conversions iirc

> Hive should raise StringIndexOutOfBoundsException when LPAD/RPAD len character's value
is negative number
> ---------------------------------------------------------------------------------------------------------
>
>                 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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