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Posted to issues@drill.apache.org by "Volodymyr Vysotskyi (JIRA)" <ji...@apache.org> on 2019/03/09 22:33:00 UTC
[jira] [Assigned] (DRILL-6524) Two CASE statements in projection
influence results of each other
[ https://issues.apache.org/jira/browse/DRILL-6524?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Volodymyr Vysotskyi reassigned DRILL-6524:
------------------------------------------
Assignee: Volodymyr Vysotskyi
> Two CASE statements in projection influence results of each other
> -----------------------------------------------------------------
>
> Key: DRILL-6524
> URL: https://issues.apache.org/jira/browse/DRILL-6524
> Project: Apache Drill
> Issue Type: Bug
> Components: Query Planning & Optimization
> Affects Versions: 1.11.0
> Environment: Linux 3.10.0-693.21.1.el7.x86_64 #1 SMP Wed Mar 7 19:03:37 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux,
> NAME="CentOS Linux"
> VERSION="7 (Core)"
> apache drill 1.11.0,
> openjdk version "1.8.0_171"
> OpenJDK Runtime Environment (build 1.8.0_171-b10)
> OpenJDK 64-Bit Server VM (build 25.171-b10, mixed mode)
> Reporter: Oleksandr Chornyi
> Assignee: Volodymyr Vysotskyi
> Priority: Major
>
> h3. Steps to Reproduce
> Run the following query via {{sqlline}}:
> {code:sql}
> select
> case when expr$0 = 3 then expr$0 else expr$1 end,
> case when expr$0 = 1 then expr$0 else expr$1 end
> from (values(1, 2));
> {code}
> h4. Actual Results
> {noformat}
> +---------+---------+
> | EXPR$0 | EXPR$1 |
> +---------+---------+
> | 2 | 2 |
> +---------+---------+
> {noformat}
> h4. Expected Results
> {noformat}
> +---------+---------+
> | EXPR$0 | EXPR$1 |
> +---------+---------+
> | 2 | 1 |
> +---------+---------+
> {noformat}
> Note, that changing order of CASE statements fixes the issue. The following query yields correct results:
> {code:sql}
> select
> case when expr$0 = 1 then expr$0 else expr$1 end,
> case when expr$0 = 3 then expr$0 else expr$1 end
> from (values(1, 2));
> {code}
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