You are viewing a plain text version of this content. The canonical link for it is here.

Posted to dev@hive.apache.org by "Zheng Shao (JIRA)" <ji...@apache.org> on 2009/04/15 05:48:15 UTC

[jira] Commented: (HIVE-415) Long queries does not parse in Hive

    [ https://issues.apache.org/jira/browse/HIVE-415?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12699041#action_12699041 ] 

Zheng Shao commented on HIVE-415:
---------------------------------

The fix turns out to be simple:

The following code in Hive.g:
{code}
queryStatementExpression
    : queryStatement (queryOperator^ queryStatementExpression)*
    ;
{code}

should be changed to:
{code}
queryStatementExpression
    : queryStatement (queryOperator^ queryStatementExpression)?
    ;
{code}


> Long queries does not parse in Hive
> -----------------------------------
>
>                 Key: HIVE-415
>                 URL: https://issues.apache.org/jira/browse/HIVE-415
>             Project: Hadoop Hive
>          Issue Type: Bug
>          Components: Query Processor
>            Reporter: Zheng Shao
>            Assignee: Zheng Shao
>            Priority: Critical
>         Attachments: HIVE-415.1.patch
>
>
> A query like this won't parse, because the Hive grammar allows backtracking:
> {code}
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable;
> {code}

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.