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https://issues.apache.org/jira/browse/HIVE-22459?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16967682#comment-16967682
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Rajkumar Singh commented on HIVE-22459:
---------------------------------------
[~chiran54321] it might be related to
https://issues.apache.org/jira/browse/HIVE-21039, can you try reproducing on
the master or apply the patch on to see if that help.
> Hive datadiff function provided inconsistent results when
> hive.ferch.task.conversion is set to none
> ---------------------------------------------------------------------------------------------------
>
> Key: HIVE-22459
> URL: https://issues.apache.org/jira/browse/HIVE-22459
> Project: Hive
> Issue Type: Improvement
> Components: HiveServer2
> Affects Versions: 3.0.0
> Reporter: Chiran Ravani
> Priority: Critical
>
> Hive datadiff function provided inconsistent results when
> hive.ferch.task.conversion to more
> Below is output, whereas in Hive 1.2 the results are consistent
> Note: Same query works well on Hive 3 when hive.ferch.task.conversion is set
> to none
> Steps to reproduce the problem.
> {code:java}
> 0: jdbc:hive2://c1113-node2.squadron.support.> select datetimecol from
> testdatediff where datediff(cast(current_timestamp as string),
> datetimecol)<183;
> INFO : Compiling
> command(queryId=hive_20191105103636_1dff22a1-02f3-48a8-b076-0b91272f2268):
> select datetimecol from testdatediff where datediff(cast(current_timestamp as
> string), datetimecol)<183
> INFO : Semantic Analysis Completed (retrial = false)
> INFO : Returning Hive schema:
> Schema(fieldSchemas:[FieldSchema(name:datetimecol, type:string,
> comment:null)], properties:null)
> INFO : Completed compiling
> command(queryId=hive_20191105103636_1dff22a1-02f3-48a8-b076-0b91272f2268);
> Time taken: 0.479 seconds
> INFO : Executing
> command(queryId=hive_20191105103636_1dff22a1-02f3-48a8-b076-0b91272f2268):
> select datetimecol from testdatediff where datediff(cast(current_timestamp as
> string), datetimecol)<183
> INFO : Completed executing
> command(queryId=hive_20191105103636_1dff22a1-02f3-48a8-b076-0b91272f2268);
> Time taken: 0.013 seconds
> INFO : OK
> +--------------+
> | datetimecol |
> +--------------+
> | 2019-07-24 |
> +--------------+
> 1 row selected (0.797 seconds)
> 0: jdbc:hive2://c1113-node2.squadron.support.>
> {code}
> After setting fetch task conversion as none.
> {code:java}
> 0: jdbc:hive2://c1113-node2.squadron.support.> set
> hive.fetch.task.conversion=none;
> No rows affected (0.017 seconds)
> 0: jdbc:hive2://c1113-node2.squadron.support.> set hive.fetch.task.conversion;
> +----------------------------------+
> | set |
> +----------------------------------+
> | hive.fetch.task.conversion=none |
> +----------------------------------+
> 1 row selected (0.015 seconds)
> 0: jdbc:hive2://c1113-node2.squadron.support.> select datetimecol from
> testdatediff where datediff(cast(current_timestamp as string),
> datetimecol)<183;
> INFO : Compiling
> command(queryId=hive_20191105103709_0c38e446-09cf-45dd-9553-365146f42452):
> select datetimecol from testdatediff where datediff(cast(current_timestamp as
> string), datetimecol)<183
> +----------------------------+
> | datetimecol |
> +----------------------------+
> | 2019-09-09T10:45:49+02:00 |
> | 2019-07-24 |
> +----------------------------+
> 2 rows selected (5.327 seconds)
> 0: jdbc:hive2://c1113-node2.squadron.support.>
> {code}
> Steps to reproduce
> {code}
> create external table testdatediff(datetimecol string) stored as orc;
> insert into testdatediff values ('2019-09-09T10:45:49+02:00'),('2019-07-24');
> select datetimecol from testdatediff where datediff(cast(current_timestamp as
> string), datetimecol)<183;
> set hive.ferch.task.conversion=none;
> select datetimecol from testdatediff where datediff(cast(current_timestamp as
> string), datetimecol)<183;
> {code}
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