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Date: Wed, 10 May 2017 23:25:04 +0000 (UTC)
From: "Sergey Shelukhin (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (HIVE-16609) col='__HIVE_DEFAULT_PARTITION__'
 condition in select statement may produce wrong result
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archived-at: Wed, 10 May 2017 23:25:08 -0000


    [ https://issues.apache.org/jira/browse/HIVE-16609?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16005619#comment-16005619 ] 

Sergey Shelukhin commented on HIVE-16609:
-----------------------------------------

The patch.

> col='__HIVE_DEFAULT_PARTITION__' condition in select statement may produce wrong result
> ---------------------------------------------------------------------------------------
>
>                 Key: HIVE-16609
>                 URL: https://issues.apache.org/jira/browse/HIVE-16609
>             Project: Hive
>          Issue Type: Bug
>          Components: Metastore
>            Reporter: Daniel Dai
>            Assignee: Daniel Dai
>         Attachments: HIVE-16609.1.patch, HIVE-16609.2.patch
>
>
> A variation of alter_partition_change_col.q produces wrong result:
> {code}
> SET hive.exec.dynamic.partition.mode = nonstrict;
> create table alter_partition_change_col0 (c1 string, c2 string);
> load data local inpath 'dec.txt' overwrite into table alter_partition_change_col0;
> create table alter_partition_change_col1 (c1 string, c2 string) partitioned by (p1 string comment 'Column p1', p2 string comment 'Column p2');
> insert overwrite table alter_partition_change_col1 partition (p1, p2)
>   select c1, c2, 'abc', '123' from alter_partition_change_col0
>   union all
>   select c1, c2, cast(null as string), '123' from alter_partition_change_col0;
> select * from alter_partition_change_col1 where p1='__HIVE_DEFAULT_PARTITION__' or lower(p1)='a';
> {code}
> The "select" statement does not produce the rows containing "__HIVE_DEFAULT_PARTITION__".
> We need another condition containing a udf so the condition is not recognized by PartFilterExprUtil.makeExpressionTree in ObjectStore. Looks like HIVE-11208 breaks it.


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