[ https://issues.apache.org/jira/browse/DRILL-2838?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jason Altekruse updated DRILL-2838: ----------------------------------- Attachment: DRILL-2838.patch > Applying flatten after joining 2 sub-queries returns empty maps > --------------------------------------------------------------- > > Key: DRILL-2838 > URL: https://issues.apache.org/jira/browse/DRILL-2838 > Project: Apache Drill > Issue Type: Bug > Components: Execution - Relational Operators > Reporter: Rahul Challapalli > Assignee: Jason Altekruse > Priority: Critical > Fix For: 1.2.0 > > Attachments: DRILL-2838.patch, data.json > > > git.commit.id.abbrev=5cd36c5 > The below query applies flatten after joining 2 subqueries. It generates > empty maps which is wrong > {code} > select v1.uid, flatten(events), flatten(transactions) from > (select uid, events from `data.json`) v1 > inner join > (select uid, transactions from `data.json`) v2 > on v1.uid = v2.uid; > +------------+------------+------------+ > | uid | EXPR$1 | EXPR$2 | > +------------+------------+------------+ > | 1 | {} | {} | > | 1 | {} | {} | > | 1 | {} | {} | > | 1 | {} | {} | > | 1 | {} | {} | > | 1 | {} | {} | > | 1 | {} | {} | > | 1 | {} | {} | > | 1 | {} | {} | > | 1 | {} | {} | > | 1 | {} | {} | > | 1 | {} | {} | > | 1 | {} | {} | > | 1 | {} | {} | > | 1 | {} | {} | > | 1 | {} | {} | > | 1 | {} | {} | > | 1 | {} | {} | > | 2 | {} | {} | > | 2 | {} | {} | > | 2 | {} | {} | > | 2 | {} | {} | > | 2 | {} | {} | > | 2 | {} | {} | > | 2 | {} | {} | > | 2 | {} | {} | > | 2 | {} | {} | > | 2 | {} | {} | > | 2 | {} | {} | > | 2 | {} | {} | > | 2 | {} | {} | > | 2 | {} | {} | > | 2 | {} | {} | > | 2 | {} | {} | > | 2 | {} | {} | > | 2 | {} | {} | > +------------+------------+------------+ > 36 rows selected (0.244 seconds) > {code} > I attached the data set. Let me know if you have any questions. -- This message was sent by Atlassian JIRA (v6.3.4#6332)