[
https://issues.apache.org/jira/browse/DRILL-2046?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Kunal Khatua closed DRILL-2046.
-------------------------------
Closing
> Merge join inconsistent results
> -------------------------------
>
> Key: DRILL-2046
> URL: https://issues.apache.org/jira/browse/DRILL-2046
> Project: Apache Drill
> Issue Type: Bug
> Components: Execution - Relational Operators
> Reporter: Rahul Challapalli
> Priority: Critical
> Attachments: widestrings_small.parquet
>
>
> git.commit.id.abbrev=a418af1
> The below queries should result in the same no of records. However the counts
> do not match when we use merge join.
> {code}
> alter session set `planner.enable_hashjoin` = false;
> select ws1.* from widestrings_small ws1 INNER JOIN widestrings_small ws2 on
> ws1.str_fixed_null_empty=ws2.str_var_null_empty where
> ws1.str_fixed_null_empty is not null and ws2.str_var_null_empty is not null
> and ws1.tinyint_var > 120;
> 6 records
> select count(*) from widestrings_small ws1 INNER JOIN widestrings_small ws2
> on ws1.str_fixed_null_empty=ws2.str_var_null_empty where
> ws1.str_fixed_null_empty is not null and ws2.str_var_null_empty is not null
> and ws1.tinyint_var > 120;
> 60 records
> select count(ws1.str_var) from widestrings_small ws1 INNER JOIN
> widestrings_small ws2 on ws1.str_fixed_null_empty=ws2.str_var_null_empty
> where ws1.str_fixed_null_empty is not null and ws2.str_var_null_empty is not
> null and ws1.tinyint_var > 120;
> 4 records
> {code}
> For hash join all the above queries result in 60 records. I attached the
> dataset used. Let me know if you have any questions.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
