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https://issues.apache.org/jira/browse/DRILL-1649?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14206651#comment-14206651
]
Jacques Nadeau edited comment on DRILL-1649 at 11/11/14 5:30 PM:
-----------------------------------------------------------------
Formatted query
{code:sql}
SELECT event_info.uid,
transaction_info.trans_id,
event_info.event.evnt_id
FROM (SELECT userinfo.transaction.trans_id trans_id,
MAX(userinfo.event.event_time) max_event_time
FROM (SELECT uid,
FLATTEN(events) event,
FLATTEN(transactions) transaction
FROM `json_kvgenflatten/single-user-transactions.json`)
userinfo
WHERE userinfo.transaction.trans_time >= userinfo.event.event_time
GROUP BY userinfo.transaction.trans_id) transaction_info
INNER JOIN (SELECT uid,
FLATTEN(events) event
FROM `json_kvgenflatten/single-user-transactions.json`)
event_info
ON transaction_info.max_event_time =
event_info.event.event_time;
{code}
was (Author: jnadeau):
Formatted query
{code:sql}
SELECT event_info.uid,
transaction_info.trans_id,
event_info.event.evnt_id
FROM (SELECT userinfo.transaction.trans_id trans_id,
Max(userinfo.event.event_time) max_event_time
FROM (SELECT uid,
Flatten(events) event,
Flatten(transactions) transaction
FROM `json_kvgenflatten/single-user-transactions.json`)
userinfo
WHERE userinfo.transaction.trans_time >= userinfo.event.event_time
GROUP BY userinfo.transaction.trans_id) transaction_info
INNER JOIN (SELECT uid,
Flatten(events) event
FROM `json_kvgenflatten/single-user-transactions.json`)
event_info
ON transaction_info.max_event_time =
event_info.event.event_time;
{code}
> JSON : Joining 2 sub-queries (one of them uses flatten) fails with "Hash Join
> doe not support schema changes"
> --------------------------------------------------------------------------------------------------------------
>
> Key: DRILL-1649
> URL: https://issues.apache.org/jira/browse/DRILL-1649
> Project: Apache Drill
> Issue Type: Bug
> Components: Functions - Drill, Storage - JSON
> Reporter: Rahul Challapalli
> Attachments: error.log, single-user-transactions.json
>
>
> git.commit.id.abbrev=60aa446
> I am running this test against Jason's branch which has some fixes to a few
> flatten issues.
> The below query fails
> {code}
> select event_info.uid, transaction_info.trans_id, event_info.event.evnt_id
> from (
> select userinfo.transaction.trans_id trans_id,
> max(userinfo.event.event_time) max_event_time
> from (
> select uid, flatten(events) event, flatten(transactions) transaction
> from `json_kvgenflatten/single-user-transactions.json`
> ) userinfo
> where userinfo.transaction.trans_time >= userinfo.event.event_time
> group by userinfo.transaction.trans_id
> ) transaction_info
> inner join
> (
> select uid, flatten(events) event
> from `json_kvgenflatten/single-user-transactions.json`
> ) event_info
> on transaction_info.max_event_time = event_info.event.event_time;
> {code}
> The problem still persists even if I create views on top of each sub-query
> and the join them
> {code}
> create view v1 as
> select userinfo.transaction.trans_id trans_id, max(userinfo.event.event_time)
> max_event_time
> from (
> select uid, flatten(events) event, flatten(transactions) transaction
> from `json_kvgenflatten/single-user-transactions.json`
> ) userinfo
> where userinfo.transaction.trans_time >= userinfo.event.event_time
> group by userinfo.transaction.trans_id;
>
> create view v2 as select uid, flatten(events) event
> from `json_kvgenflatten/single-user-transactions.json`;
>
> select v2.uid, v1.trans_id, v2.event.evnt_id
> from v1 inner join v2
> on v1.max_event_time = v2.event.event_time;
> {code}
> However if I create 2 files with the exact data from the outputs of the 2
> sub-queries and try to join them the everything works fine.
> I attached the data, and the error log files. Let me know if you need anything
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