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Posted to issues@hive.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2021/08/01 00:10:00 UTC
[jira] [Work logged] (HIVE-24902) Incorrect result after fold CASE
into COALESCE
[ https://issues.apache.org/jira/browse/HIVE-24902?focusedWorklogId=632016&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-632016 ]
ASF GitHub Bot logged work on HIVE-24902:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 01/Aug/21 00:09
Start Date: 01/Aug/21 00:09
Worklog Time Spent: 10m
Work Description: github-actions[bot] commented on pull request #2100:
URL: https://github.com/apache/hive/pull/2100#issuecomment-890420065
This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs.
Feel free to reach out on the dev@hive.apache.org list if the patch is in need of reviews.
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Issue Time Tracking
-------------------
Worklog Id: (was: 632016)
Time Spent: 40m (was: 0.5h)
> Incorrect result after fold CASE into COALESCE
> ----------------------------------------------
>
> Key: HIVE-24902
> URL: https://issues.apache.org/jira/browse/HIVE-24902
> Project: Hive
> Issue Type: Bug
> Components: CBO
> Affects Versions: 3.1.2, 4.0.0
> Reporter: Nemon Lou
> Assignee: Nemon Lou
> Priority: Major
> Labels: pull-request-available
> Time Spent: 40m
> Remaining Estimate: 0h
>
> The following sql returns only one record (20210308) but expected two(20210308
> 20210309).
> {code:sql}
> select * from (
> select
> case when b.a=1
> then
> cast (from_unixtime(unix_timestamp(cast(20210309 as string),'yyyyMMdd') - 86400,'yyyyMMdd') as bigint)
> else
> 20210309
> end
> as col
> from
> (select stack(2,1,2) as (a))
> as b
> ) t
> where t.col is not null;
> {code}
> The query plan has incorrect predict:
> predicate: COALESCE((col0 = 1),false) (type: boolean)
> {code:sql}
> STAGE DEPENDENCIES:
> Stage-0 is a root stage
> STAGE PLANS:
> Stage: Stage-0
> Fetch Operator
> limit: -1
> Processor Tree:
> TableScan
> alias: _dummy_table
> Row Limit Per Split: 1
> Statistics: Num rows: 1 Data size: 10 Basic stats: COMPLETE Column stats: COMPLETE
> Select Operator
> expressions: 2 (type: int), 1 (type: int), 2 (type: int)
> outputColumnNames: _col0, _col1, _col2
> Statistics: Num rows: 1 Data size: 12 Basic stats: COMPLETE Column stats: COMPLETE
> UDTF Operator
> Statistics: Num rows: 1 Data size: 12 Basic stats: COMPLETE Column stats: COMPLETE
> function name: stack
> Filter Operator
> predicate: COALESCE((col0 = 1),false) (type: boolean)
> Statistics: Num rows: 1 Data size: 12 Basic stats: COMPLETE Column stats: COMPLETE
> Select Operator
> expressions: CASE WHEN ((col0 = 1)) THEN (20210308L) ELSE (20210309L) END (type: bigint)
> outputColumnNames: _col0
> Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: COMPLETE
> ListSink
> Time taken: 0.155 seconds, Fetched: 28 row(s)
> {code}
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