[jira] [Assigned] (IMPALA-14551) Query hangs when selecting an expression that contains Unicode Letters

["woosuk.ro (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IMPALA-14551?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

woosuk.ro reassigned IMPALA-14551:
----------------------------------

    Assignee: woosuk.ro

>  Query hangs when selecting an expression that contains Unicode Letters
> -----------------------------------------------------------------------
>
>                 Key: IMPALA-14551
>                 URL: https://issues.apache.org/jira/browse/IMPALA-14551
>             Project: IMPALA
>          Issue Type: Bug
>          Components: Frontend
>            Reporter: woosuk.ro
>            Assignee: woosuk.ro
>            Priority: Major
>             Fix For: Impala 4.4.0
>
>
> * Summary
>  ** When a complex expression that contains Unicode Letters is selected without an alias, an error during alias mapping causes the query to hang before the planning phase. CANCEL QUERY is ineffective.
>  * Environment
>  ** Impala 4.4.0, Hive 3.1.3.
>  * Steps to Reproduce
>  ** In the SELECT list, use an expression containing Unicode Letters without an alias.
>  ** Example : `select 누적합 - lag (누적합) over (partition by day order by day) from base`
>  * Actual Behavior
>  ** During alias mapping, invoking HiveLexer triggers repeated retries without consuming input, and the query hangs. Threads remain RUNNABLE and cannot be canceled



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