[jira] [Commented] (HIVE-26320) Incorrect case evaluation for Parquet based table

["Stamatis Zampetakis (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-26320?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17554057#comment-17554057 ] 

Stamatis Zampetakis commented on HIVE-26320:
--------------------------------------------

Thanks for reporting this issue [~chiran54321] . Have you checked if the query plan is the same for Parquet, ORC, and textfile? This would allow to narrow down where the problem is: compilation vs execution. Based on the current description it seems that it is most likely on the execution side but it would be nice to clarify this.

> Incorrect case evaluation for Parquet based table
> -------------------------------------------------
>
>                 Key: HIVE-26320
>                 URL: https://issues.apache.org/jira/browse/HIVE-26320
>             Project: Hive
>          Issue Type: Bug
>          Components: HiveServer2, Query Planning
>    Affects Versions: 4.0.0-alpha-1
>            Reporter: Chiran Ravani
>            Priority: Major
>
> Query involving case statement with two or more conditions leads to incorrect result for tables with parquet format, The problem is not observed with ORC or TextFile.
> *Steps to reproduce*:
> {code:java}
> create external table case_test_parquet(kob varchar(2),enhanced_type_code int) stored as parquet;
> insert into case_test_parquet values('BB',18),('BC',18),('AB',18);
> select case when (
>                    (kob='BB' and enhanced_type_code='18')
>                    or (kob='BC' and enhanced_type_code='18')
>                  )
>             then 1
>             else 0
>         end as logic_check
> from case_test_parquet;
> {code}
> Result:
> {code}
> 0
> 0
> 0
> {code}
> Expected result:
> {code}
> 1
> 1
> 0
> {code}
> The problem does not appear when setting hive.optimize.point.lookup=false.



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