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https://issues.apache.org/jira/browse/HIVE-5690?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14133471#comment-14133471
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Navis commented on HIVE-5690:
-----------------------------
[~xuefuz] Yes, bad example made just for showing the syntax. I cannot remember
exactly but it was originated from a query something like (still dummy),
{noformat}
from LV explode_map(...) from K
insert into table X1 select to_map('a',a,'b',b,'c', c) from (select a,
count(b), sum(c) group by a) A
insert into table X2 select to_map('b',b,'d',d,'e', e) from (select b,
count(d), sum(e) group by b) B
{noformat}
> Support subquery for single sourced multi query
> -----------------------------------------------
>
> Key: HIVE-5690
> URL: https://issues.apache.org/jira/browse/HIVE-5690
> Project: Hive
> Issue Type: Improvement
> Components: Query Processor
> Reporter: Navis
> Assignee: Navis
> Priority: Minor
> Attachments: D13791.1.patch, HIVE-5690.10.patch.txt,
> HIVE-5690.11.patch.txt, HIVE-5690.12.patch.txt, HIVE-5690.2.patch.txt,
> HIVE-5690.3.patch.txt, HIVE-5690.4.patch.txt, HIVE-5690.5.patch.txt,
> HIVE-5690.6.patch.txt, HIVE-5690.7.patch.txt, HIVE-5690.8.patch.txt,
> HIVE-5690.9.patch.txt
>
>
> Single sourced multi (insert) query is very useful for various ETL processes
> but it does not allow subqueries included. For example,
> {noformat}
> explain from src
> insert overwrite table x1 select * from (select distinct key,value) b order
> by key
> insert overwrite table x2 select * from (select distinct key,value) c order
> by value;
> {noformat}
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